CVE-2021-47247 (GCVE-0-2021-47247)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-04 07:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free of encap entry in neigh update handler Function mlx5e_rep_neigh_update() wasn't updated to accommodate rtnl lock removal from TC filter update path and properly handle concurrent encap entry insertion/deletion which can lead to following use-after-free: [23827.464923] ================================================================== [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.470971] Read of size 4 at addr ffff8881d132228c by task kworker/u20:6/21635 [23827.472251] [23827.472615] CPU: 9 PID: 21635 Comm: kworker/u20:6 Not tainted 5.13.0-rc3+ #5 [23827.473788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [23827.475639] Workqueue: mlx5e mlx5e_rep_neigh_update [mlx5_core] [23827.476731] Call Trace: [23827.477260] dump_stack+0xbb/0x107 [23827.477906] print_address_description.constprop.0+0x18/0x140 [23827.478896] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.479879] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.480905] kasan_report.cold+0x7c/0xd8 [23827.481701] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.482744] kasan_check_range+0x145/0x1a0 [23827.493112] mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.494054] ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core] [23827.495296] mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core] [23827.496338] ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core] [23827.497486] ? read_word_at_a_time+0xe/0x20 [23827.498250] ? strscpy+0xa0/0x2a0 [23827.498889] process_one_work+0x8ac/0x14e0 [23827.499638] ? lockdep_hardirqs_on_prepare+0x400/0x400 [23827.500537] ? pwq_dec_nr_in_flight+0x2c0/0x2c0 [23827.501359] ? rwlock_bug.part.0+0x90/0x90 [23827.502116] worker_thread+0x53b/0x1220 [23827.502831] ? process_one_work+0x14e0/0x14e0 [23827.503627] kthread+0x328/0x3f0 [23827.504254] ? _raw_spin_unlock_irq+0x24/0x40 [23827.505065] ? __kthread_bind_mask+0x90/0x90 [23827.505912] ret_from_fork+0x1f/0x30 [23827.506621] [23827.506987] Allocated by task 28248: [23827.507694] kasan_save_stack+0x1b/0x40 [23827.508476] __kasan_kmalloc+0x7c/0x90 [23827.509197] mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core] [23827.510194] mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core] [23827.511218] __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core] [23827.512234] mlx5e_configure_flower+0x191c/0x4870 [mlx5_core] [23827.513298] tc_setup_cb_add+0x1d5/0x420 [23827.514023] fl_hw_replace_filter+0x382/0x6a0 [cls_flower] [23827.514975] fl_change+0x2ceb/0x4a51 [cls_flower] [23827.515821] tc_new_tfilter+0x89a/0x2070 [23827.516548] rtnetlink_rcv_msg+0x644/0x8c0 [23827.517300] netlink_rcv_skb+0x11d/0x340 [23827.518021] netlink_unicast+0x42b/0x700 [23827.518742] netlink_sendmsg+0x743/0xc20 [23827.519467] sock_sendmsg+0xb2/0xe0 [23827.520131] ____sys_sendmsg+0x590/0x770 [23827.520851] ___sys_sendmsg+0xd8/0x160 [23827.521552] __sys_sendmsg+0xb7/0x140 [23827.522238] do_syscall_64+0x3a/0x70 [23827.522907] entry_SYSCALL_64_after_hwframe+0x44/0xae [23827.523797] [23827.524163] Freed by task 25948: [23827.524780] kasan_save_stack+0x1b/0x40 [23827.525488] kasan_set_track+0x1c/0x30 [23827.526187] kasan_set_free_info+0x20/0x30 [23827.526968] __kasan_slab_free+0xed/0x130 [23827.527709] slab_free_freelist_hook+0xcf/0x1d0 [23827.528528] kmem_cache_free_bulk+0x33a/0x6e0 [23827.529317] kfree_rcu_work+0x55f/0xb70 [23827.530024] process_one_work+0x8ac/0x14e0 [23827.530770] worker_thread+0x53b/0x1220 [23827.531480] kthread+0x328/0x3f0 [23827.532114] ret_from_fork+0x1f/0x30 [23827.532785] [23827.533147] Last potentially related work creation: [23827.534007] kasan_save_stack+0x1b/0x40 [23827.534710] kasan_record_aux_stack+0xab/0xc0 [23827.535492] kvfree_call_rcu+0x31/0x7b0 [23827.536206] mlx5e_tc_del ---truncated---
References
Impacted products
Vendor Product Version
Linux Linux Version: 2a1f1768fa17805ca2e937e2e034a7c3433d3bdc
Version: 2a1f1768fa17805ca2e937e2e034a7c3433d3bdc
Version: 2a1f1768fa17805ca2e937e2e034a7c3433d3bdc
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              "content": {
                "id": "CVE-2021-47247",
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-28T15:53:08.543525Z",
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    "cna": {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c",
            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c",
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c",
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            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c",
            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c",
            "drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c",
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.h"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix use-after-free of encap entry in neigh update handler\n\nFunction mlx5e_rep_neigh_update() wasn\u0027t updated to accommodate rtnl lock\nremoval from TC filter update path and properly handle concurrent encap\nentry insertion/deletion which can lead to following use-after-free:\n\n [23827.464923] ==================================================================\n [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5_core]\n [23827.470971] Read of size 4 at addr ffff8881d132228c by task kworker/u20:6/21635\n [23827.472251]\n [23827.472615] CPU: 9 PID: 21635 Comm: kworker/u20:6 Not tainted 5.13.0-rc3+ #5\n [23827.473788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n [23827.475639] Workqueue: mlx5e mlx5e_rep_neigh_update [mlx5_core]\n [23827.476731] Call Trace:\n [23827.477260]  dump_stack+0xbb/0x107\n [23827.477906]  print_address_description.constprop.0+0x18/0x140\n [23827.478896]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\n [23827.479879]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\n [23827.480905]  kasan_report.cold+0x7c/0xd8\n [23827.481701]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\n [23827.482744]  kasan_check_range+0x145/0x1a0\n [23827.493112]  mlx5e_encap_take+0x72/0x140 [mlx5_core]\n [23827.494054]  ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core]\n [23827.495296]  mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core]\n [23827.496338]  ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core]\n [23827.497486]  ? read_word_at_a_time+0xe/0x20\n [23827.498250]  ? strscpy+0xa0/0x2a0\n [23827.498889]  process_one_work+0x8ac/0x14e0\n [23827.499638]  ? lockdep_hardirqs_on_prepare+0x400/0x400\n [23827.500537]  ? pwq_dec_nr_in_flight+0x2c0/0x2c0\n [23827.501359]  ? rwlock_bug.part.0+0x90/0x90\n [23827.502116]  worker_thread+0x53b/0x1220\n [23827.502831]  ? process_one_work+0x14e0/0x14e0\n [23827.503627]  kthread+0x328/0x3f0\n [23827.504254]  ? _raw_spin_unlock_irq+0x24/0x40\n [23827.505065]  ? __kthread_bind_mask+0x90/0x90\n [23827.505912]  ret_from_fork+0x1f/0x30\n [23827.506621]\n [23827.506987] Allocated by task 28248:\n [23827.507694]  kasan_save_stack+0x1b/0x40\n [23827.508476]  __kasan_kmalloc+0x7c/0x90\n [23827.509197]  mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core]\n [23827.510194]  mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core]\n [23827.511218]  __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core]\n [23827.512234]  mlx5e_configure_flower+0x191c/0x4870 [mlx5_core]\n [23827.513298]  tc_setup_cb_add+0x1d5/0x420\n [23827.514023]  fl_hw_replace_filter+0x382/0x6a0 [cls_flower]\n [23827.514975]  fl_change+0x2ceb/0x4a51 [cls_flower]\n [23827.515821]  tc_new_tfilter+0x89a/0x2070\n [23827.516548]  rtnetlink_rcv_msg+0x644/0x8c0\n [23827.517300]  netlink_rcv_skb+0x11d/0x340\n [23827.518021]  netlink_unicast+0x42b/0x700\n [23827.518742]  netlink_sendmsg+0x743/0xc20\n [23827.519467]  sock_sendmsg+0xb2/0xe0\n [23827.520131]  ____sys_sendmsg+0x590/0x770\n [23827.520851]  ___sys_sendmsg+0xd8/0x160\n [23827.521552]  __sys_sendmsg+0xb7/0x140\n [23827.522238]  do_syscall_64+0x3a/0x70\n [23827.522907]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n [23827.523797]\n [23827.524163] Freed by task 25948:\n [23827.524780]  kasan_save_stack+0x1b/0x40\n [23827.525488]  kasan_set_track+0x1c/0x30\n [23827.526187]  kasan_set_free_info+0x20/0x30\n [23827.526968]  __kasan_slab_free+0xed/0x130\n [23827.527709]  slab_free_freelist_hook+0xcf/0x1d0\n [23827.528528]  kmem_cache_free_bulk+0x33a/0x6e0\n [23827.529317]  kfree_rcu_work+0x55f/0xb70\n [23827.530024]  process_one_work+0x8ac/0x14e0\n [23827.530770]  worker_thread+0x53b/0x1220\n [23827.531480]  kthread+0x328/0x3f0\n [23827.532114]  ret_from_fork+0x1f/0x30\n [23827.532785]\n [23827.533147] Last potentially related work creation:\n [23827.534007]  kasan_save_stack+0x1b/0x40\n [23827.534710]  kasan_record_aux_stack+0xab/0xc0\n [23827.535492]  kvfree_call_rcu+0x31/0x7b0\n [23827.536206]  mlx5e_tc_del\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:07:05.668Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0d1e7a7964ce6abb28883a3906bbc20fe0009f03"
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        {
          "url": "https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3"
        }
      ],
      "title": "net/mlx5e: Fix use-after-free of encap entry in neigh update handler",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47247",
    "datePublished": "2024-05-21T14:19:44.947Z",
    "dateReserved": "2024-04-10T18:59:19.534Z",
    "dateUpdated": "2025-05-04T07:07:05.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47247\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:13.703\",\"lastModified\":\"2025-05-02T07:15:48.127\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5e: Fix use-after-free of encap entry in neigh update handler\\n\\nFunction mlx5e_rep_neigh_update() wasn\u0027t updated to accommodate rtnl lock\\nremoval from TC filter update path and properly handle concurrent encap\\nentry insertion/deletion which can lead to following use-after-free:\\n\\n [23827.464923] ==================================================================\\n [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.470971] Read of size 4 at addr ffff8881d132228c by task kworker/u20:6/21635\\n [23827.472251]\\n [23827.472615] CPU: 9 PID: 21635 Comm: kworker/u20:6 Not tainted 5.13.0-rc3+ #5\\n [23827.473788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\n [23827.475639] Workqueue: mlx5e mlx5e_rep_neigh_update [mlx5_core]\\n [23827.476731] Call Trace:\\n [23827.477260]  dump_stack+0xbb/0x107\\n [23827.477906]  print_address_description.constprop.0+0x18/0x140\\n [23827.478896]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.479879]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.480905]  kasan_report.cold+0x7c/0xd8\\n [23827.481701]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.482744]  kasan_check_range+0x145/0x1a0\\n [23827.493112]  mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.494054]  ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core]\\n [23827.495296]  mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core]\\n [23827.496338]  ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core]\\n [23827.497486]  ? read_word_at_a_time+0xe/0x20\\n [23827.498250]  ? strscpy+0xa0/0x2a0\\n [23827.498889]  process_one_work+0x8ac/0x14e0\\n [23827.499638]  ? lockdep_hardirqs_on_prepare+0x400/0x400\\n [23827.500537]  ? pwq_dec_nr_in_flight+0x2c0/0x2c0\\n [23827.501359]  ? rwlock_bug.part.0+0x90/0x90\\n [23827.502116]  worker_thread+0x53b/0x1220\\n [23827.502831]  ? process_one_work+0x14e0/0x14e0\\n [23827.503627]  kthread+0x328/0x3f0\\n [23827.504254]  ? _raw_spin_unlock_irq+0x24/0x40\\n [23827.505065]  ? __kthread_bind_mask+0x90/0x90\\n [23827.505912]  ret_from_fork+0x1f/0x30\\n [23827.506621]\\n [23827.506987] Allocated by task 28248:\\n [23827.507694]  kasan_save_stack+0x1b/0x40\\n [23827.508476]  __kasan_kmalloc+0x7c/0x90\\n [23827.509197]  mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core]\\n [23827.510194]  mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core]\\n [23827.511218]  __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core]\\n [23827.512234]  mlx5e_configure_flower+0x191c/0x4870 [mlx5_core]\\n [23827.513298]  tc_setup_cb_add+0x1d5/0x420\\n [23827.514023]  fl_hw_replace_filter+0x382/0x6a0 [cls_flower]\\n [23827.514975]  fl_change+0x2ceb/0x4a51 [cls_flower]\\n [23827.515821]  tc_new_tfilter+0x89a/0x2070\\n [23827.516548]  rtnetlink_rcv_msg+0x644/0x8c0\\n [23827.517300]  netlink_rcv_skb+0x11d/0x340\\n [23827.518021]  netlink_unicast+0x42b/0x700\\n [23827.518742]  netlink_sendmsg+0x743/0xc20\\n [23827.519467]  sock_sendmsg+0xb2/0xe0\\n [23827.520131]  ____sys_sendmsg+0x590/0x770\\n [23827.520851]  ___sys_sendmsg+0xd8/0x160\\n [23827.521552]  __sys_sendmsg+0xb7/0x140\\n [23827.522238]  do_syscall_64+0x3a/0x70\\n [23827.522907]  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n [23827.523797]\\n [23827.524163] Freed by task 25948:\\n [23827.524780]  kasan_save_stack+0x1b/0x40\\n [23827.525488]  kasan_set_track+0x1c/0x30\\n [23827.526187]  kasan_set_free_info+0x20/0x30\\n [23827.526968]  __kasan_slab_free+0xed/0x130\\n [23827.527709]  slab_free_freelist_hook+0xcf/0x1d0\\n [23827.528528]  kmem_cache_free_bulk+0x33a/0x6e0\\n [23827.529317]  kfree_rcu_work+0x55f/0xb70\\n [23827.530024]  process_one_work+0x8ac/0x14e0\\n [23827.530770]  worker_thread+0x53b/0x1220\\n [23827.531480]  kthread+0x328/0x3f0\\n [23827.532114]  ret_from_fork+0x1f/0x30\\n [23827.532785]\\n [23827.533147] Last potentially related work creation:\\n [23827.534007]  kasan_save_stack+0x1b/0x40\\n [23827.534710]  kasan_record_aux_stack+0xab/0xc0\\n [23827.535492]  kvfree_call_rcu+0x31/0x7b0\\n [23827.536206]  mlx5e_tc_del\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/mlx5e: se corrigi\u00f3 el use after free de la entrada encap en el controlador de actualizaci\u00f3n cercano. La funci\u00f3n mlx5e_rep_neigh_update() no se actualiz\u00f3 para permitir la eliminaci\u00f3n del bloqueo rtnl de la ruta de actualizaci\u00f3n del filtro TC y manejar adecuadamente inserci\u00f3n/eliminaci\u00f3n simult\u00e1nea de entradas encapsuladas que pueden conducir al siguiente use after free: [23827.464923] ================================ ==================================== [23827.469446] BUG: KASAN: use after free en mlx5e_encap_take +0x72/0x140 [mlx5_core] [23827.470971] Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff8881d132228c por tarea kworker/u20:6/21635 [23827.472251] [23827.472615] CPU: 9 PID: 21635 kworker/u20 :6 No contaminado 5.13.0 -rc3+ #5 [23827.473788] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 [23827.475639] Cola de trabajo: mlx5e mlx5e_rep_neigh_update [ mlx5_core] [23827.476731] Seguimiento de llamadas: [23827.477260] dump_stack+0xbb/0x107 [23827.477906] print_address_description.constprop.0+0x18/0x140 [23827.478896]? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.479879] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.480905] kasan_report.cold+0x7c/0xd8 [23827.481701] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.482744] kasan_check_range+0x145/0x1a0 [23827.493112] mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.494054] ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core] [23827.495296] mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core] [23827.496338] ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core] [23827.497486] ? read_word_at_a_time+0xe/0x20 [23827.498250] ? strscpy+0xa0/0x2a0 [23827.498889] process_one_work+0x8ac/0x14e0 [23827.499638] ? lockdep_hardirqs_on_prepare+0x400/0x400 [23827.500537]? pwq_dec_nr_in_flight+0x2c0/0x2c0 [23827.501359] ? rwlock_bug.part.0+0x90/0x90 [23827.502116] worker_thread+0x53b/0x1220 [23827.502831]? Process_one_work+0x14e0/0x14e0 [23827.503627] kthread+0x328/0x3f0 [23827.504254] ? _raw_spin_unlock_irq+0x24/0x40 [23827.505065] ? __kthread_bind_mask+0x90/0x90 [23827.505912] ret_from_fork+0x1f/0x30 [23827.506621] [23827.506987] Asignado por tarea 28248: [23827.507694] 0 [23827.508476] __kasan_kmalloc+0x7c/0x90 [23827.509197] mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core ] [23827.510194] mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core] [23827.511218] __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core] [23827.512234] 191c/0x4870 [mlx5_core] [23827.513298] tc_setup_cb_add+0x1d5/0x420 [23827.514023] fl_hw_replace_filter+0x382/0x6a0 [cls_flower] [23827.514975] fl_change+0x2ceb/0x4a51 [cls_flower] [23827.515821] tc_new_tfilter+0x89a/0x2070 [23827.516548] rtnetlink_rcv_msg+0x644/0x8c0 [23827.51 7300] netlink_rcv_skb+0x11d/0x340 [23827.518021] netlink_unicast+0x42b/0x700 [23827.518742] netlink_sendmsg +0x743/0xc20 [23827.519467] sock_sendmsg+0xb2/0xe0 [23827.520131] ____sys_sendmsg+0x590/0x770 [23827.520851] ___sys_sendmsg+0xd8/0x160 [23827. 521552] __sys_sendmsg+0xb7/0x140 [23827.522238] do_syscall_64+0x3a/0x70 [23827.522907] Entry_SYSCALL_64_after_hwframe+0x44 /0xae [23827.523797] [23827.524163] Liberado por la tarea 25948: [23827.524780] kasan_save_stack+0x1b/0x40 [23827.525488] kasan_set_track+0x1c/0x30 [23827.526187] _free_info+0x20/0x30 [23827.526968] __kasan_slab_free+0xed/0x130 [23827.527709] slab_free_freelist_hook+ 0xcf/0x1d0 [23827.528528] kmem_cache_free_bulk+0x33a/0x6e0 [23827.529317] kfree_rcu_work+0x55f/0xb70 [23827.530024] Process_one_work+0x8ac/0x14e0 [23827.530770 ] work_thread+0x53b/0x1220 [23827.531480] kthread+0x328/0x3f0 [23827.532114] ret_from_fork+0x1f/ 0x30 [23827.532785] [23827.533147] \u00daltima creaci\u00f3n de trabajo potencialmente relacionado: [23827.534007] kasan_save_stack+0x1b/0x40 [23827.534710] kasan_record_aux_stack+0xab/0xc0 [23827.535492] _rcu+0x31/0x7b0 [23827.536206] mlx5e_tc_del ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4\",\"versionEndExcluding\":\"5.12.13\",\"matchCriteriaId\":\"96096EDA-931C-4819-A0EA-8FF4064A624B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"96AC23B2-D46A-49D9-8203-8E1BEDCA8532\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"DA610E30-717C-4700-9F77-A3C9244F3BFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1ECD33F5-85BE-430B-8F86-8D7BD560311D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CF351855-2437-4CF5-AD7C-BDFA51F27683\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"25A855BA-2118-44F2-90EF-EBBB12AF51EF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d1e7a7964ce6abb28883a3906bbc20fe0009f03\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.426Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47247\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-28T15:53:08.543525Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-28T15:53:14.748Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"net/mlx5e: Fix use-after-free of encap entry in neigh update handler\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2a1f1768fa17805ca2e937e2e034a7c3433d3bdc\", \"lessThan\": \"0d1e7a7964ce6abb28883a3906bbc20fe0009f03\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a1f1768fa17805ca2e937e2e034a7c3433d3bdc\", \"lessThan\": \"b6447b72aca571632e71bb73a797118d5ce46a93\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a1f1768fa17805ca2e937e2e034a7c3433d3bdc\", \"lessThan\": \"fb1a3132ee1ac968316e45d21a48703a6db0b6c3\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en_tc.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.237\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c\", \"drivers/net/ethernet/mellanox/mlx5/core/en_tc.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0d1e7a7964ce6abb28883a3906bbc20fe0009f03\"}, {\"url\": \"https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93\"}, {\"url\": \"https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3\"}], \"x_generator\": {\"engine\": \"bippy-1.1.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5e: Fix use-after-free of encap entry in neigh update handler\\n\\nFunction mlx5e_rep_neigh_update() wasn\u0027t updated to accommodate rtnl lock\\nremoval from TC filter update path and properly handle concurrent encap\\nentry insertion/deletion which can lead to following use-after-free:\\n\\n [23827.464923] ==================================================================\\n [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.470971] Read of size 4 at addr ffff8881d132228c by task kworker/u20:6/21635\\n [23827.472251]\\n [23827.472615] CPU: 9 PID: 21635 Comm: kworker/u20:6 Not tainted 5.13.0-rc3+ #5\\n [23827.473788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\n [23827.475639] Workqueue: mlx5e mlx5e_rep_neigh_update [mlx5_core]\\n [23827.476731] Call Trace:\\n [23827.477260]  dump_stack+0xbb/0x107\\n [23827.477906]  print_address_description.constprop.0+0x18/0x140\\n [23827.478896]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.479879]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.480905]  kasan_report.cold+0x7c/0xd8\\n [23827.481701]  ? mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.482744]  kasan_check_range+0x145/0x1a0\\n [23827.493112]  mlx5e_encap_take+0x72/0x140 [mlx5_core]\\n [23827.494054]  ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core]\\n [23827.495296]  mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core]\\n [23827.496338]  ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core]\\n [23827.497486]  ? read_word_at_a_time+0xe/0x20\\n [23827.498250]  ? strscpy+0xa0/0x2a0\\n [23827.498889]  process_one_work+0x8ac/0x14e0\\n [23827.499638]  ? lockdep_hardirqs_on_prepare+0x400/0x400\\n [23827.500537]  ? pwq_dec_nr_in_flight+0x2c0/0x2c0\\n [23827.501359]  ? rwlock_bug.part.0+0x90/0x90\\n [23827.502116]  worker_thread+0x53b/0x1220\\n [23827.502831]  ? process_one_work+0x14e0/0x14e0\\n [23827.503627]  kthread+0x328/0x3f0\\n [23827.504254]  ? _raw_spin_unlock_irq+0x24/0x40\\n [23827.505065]  ? __kthread_bind_mask+0x90/0x90\\n [23827.505912]  ret_from_fork+0x1f/0x30\\n [23827.506621]\\n [23827.506987] Allocated by task 28248:\\n [23827.507694]  kasan_save_stack+0x1b/0x40\\n [23827.508476]  __kasan_kmalloc+0x7c/0x90\\n [23827.509197]  mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core]\\n [23827.510194]  mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core]\\n [23827.511218]  __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core]\\n [23827.512234]  mlx5e_configure_flower+0x191c/0x4870 [mlx5_core]\\n [23827.513298]  tc_setup_cb_add+0x1d5/0x420\\n [23827.514023]  fl_hw_replace_filter+0x382/0x6a0 [cls_flower]\\n [23827.514975]  fl_change+0x2ceb/0x4a51 [cls_flower]\\n [23827.515821]  tc_new_tfilter+0x89a/0x2070\\n [23827.516548]  rtnetlink_rcv_msg+0x644/0x8c0\\n [23827.517300]  netlink_rcv_skb+0x11d/0x340\\n [23827.518021]  netlink_unicast+0x42b/0x700\\n [23827.518742]  netlink_sendmsg+0x743/0xc20\\n [23827.519467]  sock_sendmsg+0xb2/0xe0\\n [23827.520131]  ____sys_sendmsg+0x590/0x770\\n [23827.520851]  ___sys_sendmsg+0xd8/0x160\\n [23827.521552]  __sys_sendmsg+0xb7/0x140\\n [23827.522238]  do_syscall_64+0x3a/0x70\\n [23827.522907]  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n [23827.523797]\\n [23827.524163] Freed by task 25948:\\n [23827.524780]  kasan_save_stack+0x1b/0x40\\n [23827.525488]  kasan_set_track+0x1c/0x30\\n [23827.526187]  kasan_set_free_info+0x20/0x30\\n [23827.526968]  __kasan_slab_free+0xed/0x130\\n [23827.527709]  slab_free_freelist_hook+0xcf/0x1d0\\n [23827.528528]  kmem_cache_free_bulk+0x33a/0x6e0\\n [23827.529317]  kfree_rcu_work+0x55f/0xb70\\n [23827.530024]  process_one_work+0x8ac/0x14e0\\n [23827.530770]  worker_thread+0x53b/0x1220\\n [23827.531480]  kthread+0x328/0x3f0\\n [23827.532114]  ret_from_fork+0x1f/0x30\\n [23827.532785]\\n [23827.533147] Last potentially related work creation:\\n [23827.534007]  kasan_save_stack+0x1b/0x40\\n [23827.534710]  kasan_record_aux_stack+0xab/0xc0\\n [23827.535492]  kvfree_call_rcu+0x31/0x7b0\\n [23827.536206]  mlx5e_tc_del\\n---truncated---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-02T06:14:31.501Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47247\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-02T06:14:31.501Z\", \"dateReserved\": \"2024-04-10T18:59:19.534Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:44.947Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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