{ "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 [] __alloc_skb+0x1ef/0x230 net/core/skbuff.c:634\n [] alloc_skb include/linux/skbuff.h:1289 [inline]\n [] kcm_sendmsg+0x269/0x1050 net/kcm/kcmsock.c:815\n [] sock_sendmsg_nosec net/socket.c:725 [inline]\n [] sock_sendmsg+0x56/0xb0 net/socket.c:748\n [] ____sys_sendmsg+0x365/0x470 net/socket.c:2494\n [] ___sys_sendmsg+0xc9/0x130 net/socket.c:2548\n [] __sys_sendmsg+0xa6/0x120 net/socket.c:2577\n [] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80\n [] 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()", 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