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vuln-cve/data/2023/54xxx/CVE-2023-54112.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2023-54112",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-12-24T13:02:52.518Z",
"datePublished": "2025-12-24T13:06:34.854Z",
"dateUpdated": "2026-05-11T19:55:42.470Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T19:55:42.470Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: Fix memory leak in error path of kcm_sendmsg()\n\nsyzbot reported a memory leak like below:\n\nBUG: memory leak\nunreferenced object 0xffff88810b088c00 (size 240):\n comm \"syz-executor186\", pid 5012, jiffies 4294943306 (age 13.680s)\n hex dump (first 32 bytes):\n 00 89 08 0b 81 88 ff ff 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 [<ffffffff83e5d5ff>] __alloc_skb+0x1ef/0x230 net/core/skbuff.c:634\n [<ffffffff84606e59>] alloc_skb include/linux/skbuff.h:1289 [inline]\n [<ffffffff84606e59>] kcm_sendmsg+0x269/0x1050 net/kcm/kcmsock.c:815\n [<ffffffff83e479c6>] sock_sendmsg_nosec net/socket.c:725 [inline]\n [<ffffffff83e479c6>] sock_sendmsg+0x56/0xb0 net/socket.c:748\n [<ffffffff83e47f55>] ____sys_sendmsg+0x365/0x470 net/socket.c:2494\n [<ffffffff83e4c389>] ___sys_sendmsg+0xc9/0x130 net/socket.c:2548\n [<ffffffff83e4c536>] __sys_sendmsg+0xa6/0x120 net/socket.c:2577\n [<ffffffff84ad7bb8>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [<ffffffff84ad7bb8>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80\n [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nIn kcm_sendmsg(), kcm_tx_msg(head)->last_skb is used as a cursor to append\nnewly allocated skbs to 'head'. If some bytes are copied, an error occurred,\nand jumped to out_error label, 'last_skb' is left unmodified. A later\nkcm_sendmsg() will use an obsoleted 'last_skb' reference, corrupting the\n'head' frag_list and causing the leak.\n\nThis patch fixes this issue by properly updating the last allocated skb in\n'last_skb'."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/kcm/kcmsock.c"
],
"versions": [
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "8dc7eb757b1652b82725f32e0c89a1e9f6c0e13b",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "5e5554389397e98fafb9efe395d8b4830dd5f042",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "479c71cda14b3c3a6515773faa39055333eaa2b7",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "33db24ad811b3576a0c2f8862506763f2be925b0",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "97275339c34cfbccd65e87bc38fd910ae66c48ba",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "16989de75497574b5fafd174c0c233d5a86858b7",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "af8085e0fc3207ecbf8b9e7a635c790e36d058c6",
"status": "affected",
"versionType": "git"
},
{
"version": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "c821a88bd720b0046433173185fd841a100d44ad",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/kcm/kcmsock.c"
],
"versions": [
{
"version": "4.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.326",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.295",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.257",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.195",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.132",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.54",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.5.4",
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "4.14.326"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "4.19.295"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "5.4.257"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "5.10.195"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "5.15.132"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.1.54"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.5.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.6",
"versionEndExcluding": "6.6"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/8dc7eb757b1652b82725f32e0c89a1e9f6c0e13b"
},
{
"url": "https://git.kernel.org/stable/c/5e5554389397e98fafb9efe395d8b4830dd5f042"
},
{
"url": "https://git.kernel.org/stable/c/479c71cda14b3c3a6515773faa39055333eaa2b7"
},
{
"url": "https://git.kernel.org/stable/c/33db24ad811b3576a0c2f8862506763f2be925b0"
},
{
"url": "https://git.kernel.org/stable/c/97275339c34cfbccd65e87bc38fd910ae66c48ba"
},
{
"url": "https://git.kernel.org/stable/c/16989de75497574b5fafd174c0c233d5a86858b7"
},
{
"url": "https://git.kernel.org/stable/c/af8085e0fc3207ecbf8b9e7a635c790e36d058c6"
},
{
"url": "https://git.kernel.org/stable/c/c821a88bd720b0046433173185fd841a100d44ad"
}
],
"title": "kcm: Fix memory leak in error path of kcm_sendmsg()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}