CVE-2021-47237 (GCVE-0-2021-47237)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2025-05-04 07:06
VLAI?
Title
net: hamradio: fix memory leak in mkiss_close
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < c634ba0b4159838ff45a60d3a0ace3b4118077a5 (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < 3942d0f9ace1a95a74930b5b4fc0e5005c62b37b (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < 765a8a04f828db7222b36a42b1031f576bfe95c3 (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < c16c4716a1b5ba4f83c7e00da457cba06761f119 (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < a49cbb762ef20655f5c91abdc13658b0af5e159d (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < 290b0b6432e2599021db0b8d6046f756d931c29f (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < f4de2b43d13b7cf3ced9310e371b90c836dbd7cd (git)
Affected: 815f62bf742718458ba822a7e1f51f285eb997f2 , < 7edcc682301492380fbdd604b4516af5ae667a13 (git)
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    Linux Linux Affected: 2.6.14
Unaffected: 0 , < 2.6.14 (semver)
Unaffected: 4.4.274 , ≤ 4.4.* (semver)
Unaffected: 4.9.274 , ≤ 4.9.* (semver)
Unaffected: 4.14.238 , ≤ 4.14.* (semver)
Unaffected: 4.19.196 , ≤ 4.19.* (semver)
Unaffected: 5.4.128 , ≤ 5.4.* (semver)
Unaffected: 5.10.46 , ≤ 5.10.* (semver)
Unaffected: 5.12.13 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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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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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c634ba0b4159838ff45a60d3a0ace3b4118077a5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.921Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47237\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:40:03.924521Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:15.379Z\"}}], \"cna\": {\"title\": \"net: hamradio: fix memory leak in mkiss_close\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"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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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.