205 lines
9.5 KiB
JSON
205 lines
9.5 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-2021-47221",
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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": "2024-04-10T18:59:19.529Z",
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"datePublished": "2024-05-21T14:19:27.553Z",
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"dateUpdated": "2026-05-11T13:50:18.334Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T13:50:18.334Z"
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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\nmm/slub: actually fix freelist pointer vs redzoning\n\nIt turns out that SLUB redzoning (\"slub_debug=Z\") checks from\ns->object_size rather than from s->inuse (which is normally bumped to\nmake room for the freelist pointer), so a cache created with an object\nsize less than 24 would have the freelist pointer written beyond\ns->object_size, causing the redzone to be corrupted by the freelist\npointer. This was very visible with \"slub_debug=ZF\":\n\n BUG test (Tainted: G B ): Right Redzone overwritten\n -----------------------------------------------------------------------------\n\n INFO: 0xffff957ead1c05de-0xffff957ead1c05df @offset=1502. First byte 0x1a instead of 0xbb\n INFO: Slab 0xffffef3950b47000 objects=170 used=170 fp=0x0000000000000000 flags=0x8000000000000200\n INFO: Object 0xffff957ead1c05d8 @offset=1496 fp=0xffff957ead1c0620\n\n Redzone (____ptrval____): bb bb bb bb bb bb bb bb ........\n Object (____ptrval____): 00 00 00 00 00 f6 f4 a5 ........\n Redzone (____ptrval____): 40 1d e8 1a aa @....\n Padding (____ptrval____): 00 00 00 00 00 00 00 00 ........\n\nAdjust the offset to stay within s->object_size.\n\n(Note that no caches of in this size range are known to exist in the\nkernel currently.)"
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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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"mm/slub.c"
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],
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"versions": [
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{
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"version": "89b83f282d8ba380cf2124f88106c57df49c538c",
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"lessThan": "f6ed2357541612a13a5841b3af4dc32ed984a25f",
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"status": "affected",
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"versionType": "git"
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{
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"version": "89b83f282d8ba380cf2124f88106c57df49c538c",
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"lessThan": "ce6e8bee7a3883e8008b30f5887dbb426aac6a35",
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"status": "affected",
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"lessThan": "e41a49fadbc80b60b48d3c095d9e2ee7ef7c9a8e",
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"status": "affected",
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}
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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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"mm/slub.c"
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],
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"versions": [
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{
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"version": "5.7",
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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": "5.7",
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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": "5.10.46",
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"lessThanOrEqual": "5.10.*",
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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": "5.12.13",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.7",
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"versionEndExcluding": "5.10.46"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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"url": "https://git.kernel.org/stable/c/f6ed2357541612a13a5841b3af4dc32ed984a25f"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce6e8bee7a3883e8008b30f5887dbb426aac6a35"
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},
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{
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"url": "https://git.kernel.org/stable/c/e41a49fadbc80b60b48d3c095d9e2ee7ef7c9a8e"
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}
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],
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"title": "mm/slub: actually fix freelist pointer vs redzoning",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"adp": [
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-17T17:38:07.843861Z",
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"id": "CVE-2021-47221",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-06-17T17:40:09.755Z"
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"dateUpdated": "2024-08-04T05:32:07.427Z"
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