178 lines
9.1 KiB
JSON
178 lines
9.1 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-2026-98920",
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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": "2026-09-25T10:25:14.380Z",
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"datePublished": "2026-10-23T12:02:06.560Z",
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"dateUpdated": "2026-11-10T18:15:20.857Z"
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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": "2026-11-10T18:15:20.857Z"
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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\nnetfs: Fix missing alloc tagging of direct mempool allocations\n\nCommit 1d78d56c43ef (\"netfs: Fix folio_queue ENOMEM in writeback by\nadding a mempool\") added a mempool for the folio_queues and made the\nrequest, subrequest and folio_queue allocations distinguish between\nwriteback and everything else. Writeback is part of memory reclaim\nand must not fail due to ENOMEM, so it allocates under GFP_NOFS\nthrough mempool_alloc(), which may dip into the pool's reserve and,\nif that runs empty, wait for elements to be returned. The\nGFP_KERNEL paths, which can return -ENOMEM to their callers, invoke\nthe pool's ->alloc() callback directly instead.\n\nThe direct call, however, skips the alloc_hooks() wrapper that the\nmempool_alloc() macro provides. The pool callbacks, mempool_alloc_slab()\nand mempool_kmalloc(), call kmem_cache_alloc_noprof() and kmalloc_noprof()\nand rely on current->alloc_tag having been set by the caller. With\nCONFIG_MEM_ALLOC_PROFILING_DEBUG=y this leads to\n\n current->alloc_tag not set\n WARNING: ./include/linux/alloc_tag.h:161 at __alloc_tagging_slab_alloc_hook\n alloc_tag was not set\n WARNING: ./include/linux/alloc_tag.h:166 at __alloc_tagging_slab_free_hook\n\nat allocation and free time respectively, as reported when reading\nfiles on a CIFS mount. The allocations are also missing from\n/proc/allocinfo.\n\nWrap the direct ->alloc() invocations in alloc_hooks() with a new\nmempool_alloc_noreserve() helper in include/linux/mempool.h, next to\nthe other alloc_hooks()-wrapped macros such as mempool_alloc(). The\nGFP_KERNEL paths keep their failable allocation semantics, they just\nget tagged now."
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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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"fs/netfs/objects.c",
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"fs/netfs/rolling_buffer.c",
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"include/linux/mempool.h"
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],
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"versions": [
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{
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"version": "b343252d6f536203dd0660f676190dcbf6d2ecdc",
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"lessThan": "6ba3d758cd40888908f96d68d69322dad65a871e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "15ed8a9b7c63e9171f5139a6aaa1ffb61809861f",
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"lessThan": "5c03da745171485fd181f17b69213464f6d05f3d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1d78d56c43ef3768183e8370e7367b162700e049",
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"lessThan": "37a2042748bc880df03ff8315db86ed82991fbb8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1d78d56c43ef3768183e8370e7367b162700e049",
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"lessThan": "b78b728e21c32ec4c330b299f657fb1eb02dffc2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3f6d7f8a5416d852648d15a05e895f1195ee8a85",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.12.114",
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"lessThan": "6.12.117",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "7.1.8",
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"lessThan": "7.2",
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"status": "affected",
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"versionType": "semver"
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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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"fs/netfs/objects.c",
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"fs/netfs/rolling_buffer.c",
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"include/linux/mempool.h"
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],
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"versions": [
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{
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"version": "7.2",
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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": "7.2",
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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": "6.12.117",
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"lessThanOrEqual": "6.12.*",
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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": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.114",
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"versionEndExcluding": "6.12.117"
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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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"versionStartIncluding": "7.2",
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"versionEndExcluding": "7.2.9"
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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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"versionStartIncluding": "7.2",
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"versionEndExcluding": "7.3"
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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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"versionStartIncluding": "7.1.8"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6ba3d758cd40888908f96d68d69322dad65a871e"
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},
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{
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"url": "https://git.kernel.org/stable/c/5c03da745171485fd181f17b69213464f6d05f3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/37a2042748bc880df03ff8315db86ed82991fbb8"
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},
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{
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"url": "https://git.kernel.org/stable/c/b78b728e21c32ec4c330b299f657fb1eb02dffc2"
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}
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],
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"title": "netfs: Fix missing alloc tagging of direct mempool allocations",
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"x_generator": {
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} |