CVE-2021-47237 (GCVE-0-2021-47237)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-04 07:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hamradio: fix memory leak in mkiss_close My local syzbot instance hit memory leak in mkiss_open()[1]. The problem was in missing free_netdev() in mkiss_close(). In mkiss_open() netdevice is allocated and then registered, but in mkiss_close() netdevice was only unregistered, but not freed. Fail log: BUG: memory leak unreferenced object 0xffff8880281ba000 (size 4096): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .'.*............ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706e7e8>] alloc_netdev_mqs+0x98/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880141a9a00 (size 96): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@.......... backtrace: [<ffffffff8709f68b>] __hw_addr_create_ex+0x5b/0x310 [<ffffffff8709fb38>] __hw_addr_add_ex+0x1f8/0x2b0 [<ffffffff870a0c7b>] dev_addr_init+0x10b/0x1f0 [<ffffffff8706e88b>] alloc_netdev_mqs+0x13b/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff8880219bfc00 (size 512): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706eec7>] alloc_netdev_mqs+0x777/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888029b2b200 (size 256): comm "syz-executor.1", pid 11443, jiffies 4295046091 (age 17.660s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81a27201>] kvmalloc_node+0x61/0xf0 [<ffffffff8706f062>] alloc_netdev_mqs+0x912/0xe80 [<ffffffff84e64192>] mkiss_open+0xb2/0x6f0 [1] [<ffffffff842355db>] tty_ldisc_open+0x9b/0x110 [<ffffffff84236488>] tty_set_ldisc+0x2e8/0x670 [<ffffffff8421f7f3>] tty_ioctl+0xda3/0x1440 [<ffffffff81c9f273>] __x64_sys_ioctl+0x193/0x200 [<ffffffff8911263a>] do_syscall_64+0x3a/0xb0 [<ffffffff89200068>] entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd Patch
Impacted products
Vendor Product Version
Linux Linux Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
Version: 815f62bf742718458ba822a7e1f51f285eb997f2
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hamradio: fix memory leak in mkiss_close\n\nMy local syzbot instance hit memory leak in\nmkiss_open()[1]. The problem was in missing\nfree_netdev() in mkiss_close().\n\nIn mkiss_open() netdevice is allocated and then\nregistered, but in mkiss_close() netdevice was\nonly unregistered, but not freed.\n\nFail log:\n\nBUG: memory leak\nunreferenced object 0xffff8880281ba000 (size 4096):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\n    00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .\u0027.*............\n  backtrace:\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n    [\u003cffffffff8706e7e8\u003e] alloc_netdev_mqs+0x98/0xe80\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880141a9a00 (size 96):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\n    98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\n  backtrace:\n    [\u003cffffffff8709f68b\u003e] __hw_addr_create_ex+0x5b/0x310\n    [\u003cffffffff8709fb38\u003e] __hw_addr_add_ex+0x1f8/0x2b0\n    [\u003cffffffff870a0c7b\u003e] dev_addr_init+0x10b/0x1f0\n    [\u003cffffffff8706e88b\u003e] alloc_netdev_mqs+0x13b/0xe80\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff8880219bfc00 (size 512):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\n    80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n    [\u003cffffffff8706eec7\u003e] alloc_netdev_mqs+0x777/0xe80\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBUG: memory leak\nunreferenced object 0xffff888029b2b200 (size 256):\n  comm \"syz-executor.1\", pid 11443, jiffies 4295046091 (age 17.660s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\n    [\u003cffffffff8706f062\u003e] alloc_netdev_mqs+0x912/0xe80\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
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          "url": "https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d"
        },
        {
          "url": "https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13"
        }
      ],
      "title": "net: hamradio: fix memory leak in mkiss_close",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47237",
    "datePublished": "2024-05-21T14:19:38.396Z",
    "dateReserved": "2024-04-10T18:59:19.531Z",
    "dateUpdated": "2025-05-04T07:06:54.347Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47237\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:12.930\",\"lastModified\":\"2024-12-30T19:05:28.320\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hamradio: fix memory leak in mkiss_close\\n\\nMy local syzbot instance hit memory leak in\\nmkiss_open()[1]. The problem was in missing\\nfree_netdev() in mkiss_close().\\n\\nIn mkiss_open() netdevice is allocated and then\\nregistered, but in mkiss_close() netdevice was\\nonly unregistered, but not freed.\\n\\nFail log:\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880281ba000 (size 4096):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\\n    00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .\u0027.*............\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706e7e8\u003e] alloc_netdev_mqs+0x98/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880141a9a00 (size 96):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\\n    98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\\n  backtrace:\\n    [\u003cffffffff8709f68b\u003e] __hw_addr_create_ex+0x5b/0x310\\n    [\u003cffffffff8709fb38\u003e] __hw_addr_add_ex+0x1f8/0x2b0\\n    [\u003cffffffff870a0c7b\u003e] dev_addr_init+0x10b/0x1f0\\n    [\u003cffffffff8706e88b\u003e] alloc_netdev_mqs+0x13b/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880219bfc00 (size 512):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\\n    80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706eec7\u003e] alloc_netdev_mqs+0x777/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff888029b2b200 (size 256):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706f062\u003e] alloc_netdev_mqs+0x912/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: hamradio: corrige la p\u00e9rdida de memoria en mkiss_close. Mi instancia local de syzbot tuvo una p\u00e9rdida de memoria en mkiss_open()[1]. El problema estaba en que faltaba free_netdev() en mkiss_close(). En mkiss_open() el dispositivo de red se asigna y luego se registra, pero en mkiss_close() el dispositivo de red solo se anula del registro, pero no se libera. Registro de errores: ERROR: p\u00e9rdida de memoria, objeto sin referencia 0xffff8880281ba000 (tama\u00f1o 4096): comunicaci\u00f3n \\\"syz-executor.1\\\", pid 11443, santiam\u00e9n 4295046091 (edad 17,660 s) volcado hexadecimal (primeros 32 bytes): 61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00 ax0............. 00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00 .\u0027.*....... .... seguimiento: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x98/0xe80 [] mkiss_open+0xb2/0x6f0 [] tty_ldisc_open+0x9b/0x110 [ ] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR : p\u00e9rdida de memoria objeto sin referencia 0xffff8880141a9a00 (tama\u00f1o 96): comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (edad 17.660s) volcado hexadecimal (primeros 32 bytes): e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff ...(.......(.... 98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00 .....@....... .. seguimiento: [] __hw_addr_create_ex+0x5b/0x310 [] __hw_addr_add_ex+0x1f8/0x2b0 [] f0 [] alloc_netdev_mqs+0x13b/0xe80 [] mkiss_open +0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: p\u00e9rdida de memoria objeto sin referencia 0xffff8880219bfc00 (tama\u00f1o 512): comm \\\"syz-executor.1\\\", pid 11443, jiffies 95046091 (edad 17.660 a\u00f1os) volcado hexadecimal (primeros 32 bytes): 00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ...(............ 80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00 ................ rastreo inverso: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x777/0xe80 [] mkiss_open+0xb2 /0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+0x3a/0xb0 [] Entry_SYSCALL_64_after_hwframe+0x44/0xae ERROR: p\u00e9rdida de memoria objeto sin referencia 0xffff888029b2b200 (tama\u00f1o 256): comm \\\"syz-executor.1\\\", pid 11443, jiffies 046091 (edad 17.660 a\u00f1os) volcado hexadecimal (primero 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ rastreo inverso: [] kvmalloc_node+0x61/0xf0 [] alloc_netdev_mqs+0x912/0xe80 [] mkiss_open+0xb2/0x6f0 [1] [] tty_ldisc_open+0x9b/0x110 [] tty_set_ldisc+0x2e8/0x670 [] tty_ioctl+0xda3/0x1440 [] __x64_sys_ioctl+0x193/0x200 [] do_syscall_64+ 0x3a/0xb0 [] 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[{\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"c634ba0b4159838ff45a60d3a0ace3b4118077a5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"3942d0f9ace1a95a74930b5b4fc0e5005c62b37b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"765a8a04f828db7222b36a42b1031f576bfe95c3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"c16c4716a1b5ba4f83c7e00da457cba06761f119\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"a49cbb762ef20655f5c91abdc13658b0af5e159d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"290b0b6432e2599021db0b8d6046f756d931c29f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"f4de2b43d13b7cf3ced9310e371b90c836dbd7cd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"815f62bf742718458ba822a7e1f51f285eb997f2\", \"lessThan\": \"7edcc682301492380fbdd604b4516af5ae667a13\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/hamradio/mkiss.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.14\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.14\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.238\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.196\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.46\", \"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/hamradio/mkiss.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5\"}, {\"url\": \"https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b\"}, {\"url\": \"https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3\"}, {\"url\": \"https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119\"}, {\"url\": \"https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d\"}, {\"url\": \"https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f\"}, {\"url\": \"https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd\"}, {\"url\": \"https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hamradio: fix memory leak in mkiss_close\\n\\nMy local syzbot instance hit memory leak in\\nmkiss_open()[1]. The problem was in missing\\nfree_netdev() in mkiss_close().\\n\\nIn mkiss_open() netdevice is allocated and then\\nregistered, but in mkiss_close() netdevice was\\nonly unregistered, but not freed.\\n\\nFail log:\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880281ba000 (size 4096):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    61 78 30 00 00 00 00 00 00 00 00 00 00 00 00 00  ax0.............\\n    00 27 fa 2a 80 88 ff ff 00 00 00 00 00 00 00 00  .\u0027.*............\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706e7e8\u003e] alloc_netdev_mqs+0x98/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880141a9a00 (size 96):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    e8 a2 1b 28 80 88 ff ff e8 a2 1b 28 80 88 ff ff  ...(.......(....\\n    98 92 9c aa b0 40 02 00 00 00 00 00 00 00 00 00  .....@..........\\n  backtrace:\\n    [\u003cffffffff8709f68b\u003e] __hw_addr_create_ex+0x5b/0x310\\n    [\u003cffffffff8709fb38\u003e] __hw_addr_add_ex+0x1f8/0x2b0\\n    [\u003cffffffff870a0c7b\u003e] dev_addr_init+0x10b/0x1f0\\n    [\u003cffffffff8706e88b\u003e] alloc_netdev_mqs+0x13b/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff8880219bfc00 (size 512):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    00 a0 1b 28 80 88 ff ff 80 8f b1 8d ff ff ff ff  ...(............\\n    80 8f b1 8d ff ff ff ff 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706eec7\u003e] alloc_netdev_mqs+0x777/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBUG: memory leak\\nunreferenced object 0xffff888029b2b200 (size 256):\\n  comm \\\"syz-executor.1\\\", pid 11443, jiffies 4295046091 (age 17.660s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffff81a27201\u003e] kvmalloc_node+0x61/0xf0\\n    [\u003cffffffff8706f062\u003e] alloc_netdev_mqs+0x912/0xe80\\n    [\u003cffffffff84e64192\u003e] mkiss_open+0xb2/0x6f0 [1]\\n    [\u003cffffffff842355db\u003e] tty_ldisc_open+0x9b/0x110\\n    [\u003cffffffff84236488\u003e] tty_set_ldisc+0x2e8/0x670\\n    [\u003cffffffff8421f7f3\u003e] tty_ioctl+0xda3/0x1440\\n    [\u003cffffffff81c9f273\u003e] __x64_sys_ioctl+0x193/0x200\\n    [\u003cffffffff8911263a\u003e] do_syscall_64+0x3a/0xb0\\n    [\u003cffffffff89200068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T07:37:58.889Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47237\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:37:58.889Z\", \"dateReserved\": \"2024-04-10T18:59:19.531Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:38.396Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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