221 lines
10 KiB
JSON
221 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-26824",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-02-19T14:20:24.181Z",
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"datePublished": "2024-04-17T09:43:50.485Z",
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"dateUpdated": "2026-08-05T11:27:39.564Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:27:39.564Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"crypto/algif_hash.c"
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],
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"versions": [
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{
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"version": "b6d972f6898308fbe7e693bf8d44ebfdb1cd2dc4",
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"lessThan": "9c82920359b7c1eddaf72069bcfe0ffddf088cd0",
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"status": "affected",
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"lessThan": "775f3c1882a493168e08fdb8cde0865c8f3a8a29",
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"status": "affected",
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},
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"lessThan": "24c890dd712f6345e382256cae8c97abb0406b70",
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"status": "affected",
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"crypto/algif_hash.c"
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],
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"versions": [
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{
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"version": "6.5",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.5",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.18",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.7.6",
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"lessThanOrEqual": "6.7.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.8",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"versionStartIncluding": "6.5",
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"versionEndExcluding": "6.6.18"
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"references": [
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"url": "https://git.kernel.org/stable/c/9c82920359b7c1eddaf72069bcfe0ffddf088cd0"
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}
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"title": "crypto: algif_hash - Remove bogus SGL free on zero-length error path",
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{
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-26824",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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"version": "2.0.3",
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"timestamp": "2024-09-10T15:49:04.153967Z"
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"title": "CISA ADP Vulnrichment",
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