fkie_cve-2025-21865
Vulnerability from fkie_nvd
Published
2025-03-12 10:15
Modified
2025-03-13 21:13
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl(). Brad Spengler reported the list_del() corruption splat in gtp_net_exit_batch_rtnl(). [0] Commit eb28fd76c0a0 ("gtp: Destroy device along with udp socket's netns dismantle.") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl() to destroy devices in each netns as done in geneve and ip tunnels. However, this could trigger ->dellink() twice for the same device during ->exit_batch_rtnl(). Say we have two netns A & B and gtp device B that resides in netns B but whose UDP socket is in netns A. 1. cleanup_net() processes netns A and then B. 2. gtp_net_exit_batch_rtnl() finds the device B while iterating netns A's gn->gtp_dev_list and calls ->dellink(). [ device B is not yet unlinked from netns B as unregister_netdevice_many() has not been called. ] 3. gtp_net_exit_batch_rtnl() finds the device B while iterating netns B's for_each_netdev() and calls ->dellink(). gtp_dellink() cleans up the device's hash table, unlinks the dev from gn->gtp_dev_list, and calls unregister_netdevice_queue(). Basically, calling gtp_dellink() multiple times is fine unless CONFIG_DEBUG_LIST is enabled. Let's remove for_each_netdev() in gtp_net_exit_batch_rtnl() and delegate the destruction to default_device_exit_batch() as done in bareudp. [0]: list_del corruption, ffff8880aaa62c00->next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04) kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G T 6.12.13-grsec-full-20250211091339 #1 Tainted: [T]=RANDSTRUCT Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:[<ffffffff84947381>] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 Code: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc <0f> 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60 RSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283 RAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054 RDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000 RBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32 R10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4 R13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08 RBX: kasan shadow of 0x0 RCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554 RDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 RSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71 RBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object] RSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ] R09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ] R10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ] R15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object] FS: 0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0 Stack: 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00 ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d Call Trace: <TASK> [<ffffffff8a0c360d>] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28 [<ffffffff8a0c360d>] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28 [<ffffffff8a0c360d>] list_del include/linux/list.h:262 [inl ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33eb925c0c26e86ca540a08254806512bf911f22Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/37e7644b961600ef0beb01d3970c3034a62913afPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ccacf86491d33d2486b62d4d44864d7101b299dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f86fb07db65a470d0c11f79da551bd9466357dcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d03e7e37187ae140e716377599493987fb20c5bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b70fa591b066d52b141fc430ffdee35b6cc87a66Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb15bb1bde0ba97cbbed9508e45210dcafec3657Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff81b14010362f6188ca26fec22ff05e4da45595Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.4.290
linux linux_kernel 5.10.234
linux linux_kernel 5.15.177
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().\n\nBrad Spengler reported the list_del() corruption splat in\ngtp_net_exit_batch_rtnl(). [0]\n\nCommit eb28fd76c0a0 (\"gtp: Destroy device along with udp socket\u0027s netns\ndismantle.\") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()\nto destroy devices in each netns as done in geneve and ip tunnels.\n\nHowever, this could trigger -\u003edellink() twice for the same device during\n-\u003eexit_batch_rtnl().\n\nSay we have two netns A \u0026 B and gtp device B that resides in netns B but\nwhose UDP socket is in netns A.\n\n  1. cleanup_net() processes netns A and then B.\n\n  2. gtp_net_exit_batch_rtnl() finds the device B while iterating\n     netns A\u0027s gn-\u003egtp_dev_list and calls -\u003edellink().\n\n  [ device B is not yet unlinked from netns B\n    as unregister_netdevice_many() has not been called. ]\n\n  3. gtp_net_exit_batch_rtnl() finds the device B while iterating\n     netns B\u0027s for_each_netdev() and calls -\u003edellink().\n\ngtp_dellink() cleans up the device\u0027s hash table, unlinks the dev from\ngn-\u003egtp_dev_list, and calls unregister_netdevice_queue().\n\nBasically, calling gtp_dellink() multiple times is fine unless\nCONFIG_DEBUG_LIST is enabled.\n\nLet\u0027s remove for_each_netdev() in gtp_net_exit_batch_rtnl() and\ndelegate the destruction to default_device_exit_batch() as done\nin bareudp.\n\n[0]:\nlist_del corruption, ffff8880aaa62c00-\u003enext (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)\nkernel BUG at lib/list_debug.c:58!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN\nCPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G                T   6.12.13-grsec-full-20250211091339 #1\nTainted: [T]=RANDSTRUCT\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: netns cleanup_net\nRIP: 0010:[\u003cffffffff84947381\u003e] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nCode: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u003c0f\u003e 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60\nRSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283\nRAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054\nRDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000\nRBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32\nR10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4\nR13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08\nRBX: kasan shadow of 0x0\nRCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554\nRDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nRSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71\nRBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]\nRSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]\nR09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]\nR10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]\nR15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]\nFS:  0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0\nStack:\n 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00\n ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005\n 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d\nCall Trace:\n \u003cTASK\u003e\n [\u003cffffffff8a0c360d\u003e] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28\n [\u003cffffffff8a0c360d\u003e] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28\n [\u003cffffffff8a0c360d\u003e] list_del include/linux/list.h:262 [inl\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gtp: Supresi\u00f3n de la corrupci\u00f3n de listas en gtp_net_exit_batch_rtnl(). Brad Spengler report\u00f3 la corrupci\u00f3n de list_del() en gtp_net_exit_batch_rtnl(). [0] El commit eb28fd76c0a0 (\"gtp: Destruir dispositivo junto con el desmantelamiento de netns del socket UDP\") a\u00f1adi\u00f3 el bucle for_each_netdev() en gtp_net_exit_batch_rtnl() para destruir dispositivos en cada netns, como se hace en los t\u00faneles geneve e IP. Sin embargo, esto podr\u00eda activar -\u0026gt;dellink() dos veces para el mismo dispositivo durante -\u0026gt;exit_batch_rtnl(). Digamos que tenemos dos netns A y B y un dispositivo gtp B que reside en netns B pero cuyo socket UDP est\u00e1 en netns A. 1. cleanup_net() procesa netns A y luego B. 2. gtp_net_exit_batch_rtnl() encuentra el dispositivo B mientras itera gn-\u0026gt;gtp_dev_list de netns A y llama a -\u0026gt;dellink(). [el dispositivo B a\u00fan no est\u00e1 desvinculado de netns B ya que no se ha llamado a unregister_netdevice_many().] 3. gtp_net_exit_batch_rtnl() encuentra el dispositivo B mientras itera for_each_netdev() de netns B y llama a -\u0026gt;dellink(). gtp_dellink() limpia la tabla hash del dispositivo, desvincula el dev de gn-\u0026gt;gtp_dev_list y llama a unregister_netdevice_queue(). B\u00e1sicamente, llamar a gtp_dellink() varias veces no tiene problema a menos que CONFIG_DEBUG_LIST est\u00e9 habilitado. Eliminemos for_each_netdev() en gtp_net_exit_batch_rtnl() y deleguemos la destrucci\u00f3n a default_device_exit_batch() como se hace en bareudp. [0]: corrupci\u00f3n en list_del, ffff8880aaa62c00-\u0026gt;next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04) kernel BUG at lib/list_debug.c:58! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G T 6.12.13-grsec-full-20250211091339 #1 Tainted: [T]=RANDSTRUCT Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:[] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 Code: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc \u0026lt;0f\u0026gt; 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60 RSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283 RAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054 RDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000 RBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32 R10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4 R13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08 RBX: kasan shadow of 0x0 RCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554 RDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58 RSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71 RBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object] RSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ] R09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ] R10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ] R15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object] FS: 0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0 Stack: 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00 ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d Call Trace:  [] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28 [] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28 [] list_del include/linux/list.h:262 [inl ---truncado---"
    }
  ],
  "id": "CVE-2025-21865",
  "lastModified": "2025-03-13T21:13:25.760",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-03-12T10:15:19.650",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/33eb925c0c26e86ca540a08254806512bf911f22"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/37e7644b961600ef0beb01d3970c3034a62913af"
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      "url": "https://git.kernel.org/stable/c/9d03e7e37187ae140e716377599493987fb20c5b"
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      "url": "https://git.kernel.org/stable/c/b70fa591b066d52b141fc430ffdee35b6cc87a66"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cb15bb1bde0ba97cbbed9508e45210dcafec3657"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ff81b14010362f6188ca26fec22ff05e4da45595"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.