{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-26824", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.181Z", "datePublished": "2024-04-17T09:43:50.485Z", "dateUpdated": "2026-08-05T11:27:39.564Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:27:39.564Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: algif_hash - Remove bogus SGL free on zero-length error path\n\nWhen a zero-length message is hashed by algif_hash, and an error\nis triggered, it tries to free an SG list that was never allocated\nin the first place. Fix this by not freeing the SG list on the\nzero-length error path." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached only through local syscalls on an AF_ALG socket (socket/bind/accept/sendmsg); there is no network-facing path to this code.\nAC:L - The error path is reliably forced by exhausting the socket's optmem so hash_alloc_result's sock_kmalloc fails, and the uninitialized sgt.sgl can be heap-groomed to a controlled non-NULL value; no race or condition outside attacker control is needed.\nPR:L - AF_ALG socket creation and bind perform no capability check, so any unprivileged local user can allocate a hash socket, mark it MSG_MORE, and accept() a child with uninitialized SGL.\nUI:N - The entire trigger sequence is performed by the attacker's own syscalls; no victim action is required.\nS:U - The corruption stays within the kernel's own security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Freeing an attacker-groomable uninitialized pointer and unpinning arbitrary pages yields heap corruption/UAF that can be leveraged to disclose kernel memory contents.\nI:H - The bogus free of a controllable pointer is an arbitrary-free primitive enabling heap manipulation and subsequent arbitrary write via UAF, allowing kernel state modification.\nA:H - Freeing/dereferencing an invalid or uninitialized pointer readily causes a kernel oops or panic, denying service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "crypto/algif_hash.c" ], "versions": [ { "version": "b6d972f6898308fbe7e693bf8d44ebfdb1cd2dc4", "lessThan": "9c82920359b7c1eddaf72069bcfe0ffddf088cd0", "status": "affected", "versionType": "git" }, { "version": "b6d972f6898308fbe7e693bf8d44ebfdb1cd2dc4", "lessThan": "775f3c1882a493168e08fdb8cde0865c8f3a8a29", "status": "affected", "versionType": "git" }, { "version": "b6d972f6898308fbe7e693bf8d44ebfdb1cd2dc4", "lessThan": "24c890dd712f6345e382256cae8c97abb0406b70", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "crypto/algif_hash.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.18", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.6", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "6.5", "versionEndExcluding": "6.6.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.7.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9c82920359b7c1eddaf72069bcfe0ffddf088cd0" }, { "url": "https://git.kernel.org/stable/c/775f3c1882a493168e08fdb8cde0865c8f3a8a29" }, { "url": "https://git.kernel.org/stable/c/24c890dd712f6345e382256cae8c97abb0406b70" } ], "title": "crypto: algif_hash - Remove bogus SGL free on zero-length error path", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.533Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/9c82920359b7c1eddaf72069bcfe0ffddf088cd0", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/775f3c1882a493168e08fdb8cde0865c8f3a8a29", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/24c890dd712f6345e382256cae8c97abb0406b70", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26824", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:49:04.153967Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:31.369Z" } } ] } }