{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98920", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.380Z", "datePublished": "2026-10-23T12:02:06.560Z", "dateUpdated": "2026-10-23T12:05:25.919Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:05:25.919Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/objects.c", "fs/netfs/rolling_buffer.c", "include/linux/mempool.h"], "versions": [{"version": "15ed8a9b7c63e9171f5139a6aaa1ffb61809861f", "lessThan": "5c03da745171485fd181f17b69213464f6d05f3d", "status": "affected", "versionType": "git"}, {"version": "1d78d56c43ef3768183e8370e7367b162700e049", "lessThan": "37a2042748bc880df03ff8315db86ed82991fbb8", "status": "affected", "versionType": "git"}, {"version": "1d78d56c43ef3768183e8370e7367b162700e049", "lessThan": "b78b728e21c32ec4c330b299f657fb1eb02dffc2", "status": "affected", "versionType": "git"}, {"version": "b343252d6f536203dd0660f676190dcbf6d2ecdc", "status": "affected", "versionType": "git"}, {"version": "3f6d7f8a5416d852648d15a05e895f1195ee8a85", "status": "affected", "versionType": "git"}, {"version": "6.12.114", "lessThan": "6.13", "status": "affected", "versionType": "semver"}, {"version": "7.1.8", "lessThan": "7.2", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/objects.c", "fs/netfs/rolling_buffer.c", "include/linux/mempool.h"], "versions": [{"version": "7.2", "status": "affected"}, {"version": "0", "lessThan": "7.2", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "7.2", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5c03da745171485fd181f17b69213464f6d05f3d"}, {"url": "https://git.kernel.org/stable/c/37a2042748bc880df03ff8315db86ed82991fbb8"}, {"url": "https://git.kernel.org/stable/c/b78b728e21c32ec4c330b299f657fb1eb02dffc2"}], "title": "netfs: Fix missing alloc tagging of direct mempool allocations", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/netfs/objects.c", "fs/netfs/rolling_buffer.c", "include/linux/mempool.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5c03da745171485fd181f17b69213464f6d05f3d", "status": "affected", "version": "15ed8a9b7c63e9171f5139a6aaa1ffb61809861f", "versionType": "git"}, {"lessThan": "37a2042748bc880df03ff8315db86ed82991fbb8", "status": "affected", "version": "1d78d56c43ef3768183e8370e7367b162700e049", "versionType": "git"}, {"lessThan": "b78b728e21c32ec4c330b299f657fb1eb02dffc2", "status": "affected", "version": "1d78d56c43ef3768183e8370e7367b162700e049", "versionType": "git"}, {"status": "affected", "version": "b343252d6f536203dd0660f676190dcbf6d2ecdc", "versionType": "git"}, {"status": "affected", "version": "3f6d7f8a5416d852648d15a05e895f1195ee8a85", "versionType": "git"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.114", "versionType": "semver"}, {"lessThan": "7.2", "status": "affected", "version": "7.1.8", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/netfs/objects.c", "fs/netfs/rolling_buffer.c", "include/linux/mempool.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.2"}, {"lessThan": "7.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-98920", "lastModified": "2026-10-23T13:17:12.617", "metrics": {}, "published": "2026-10-23T13:17:12.617", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37a2042748bc880df03ff8315db86ed82991fbb8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c03da745171485fd181f17b69213464f6d05f3d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b78b728e21c32ec4c330b299f657fb1eb02dffc2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15ed8a9b7c63e9171f5139a6aaa1ffb61809861f,5c03da745171485fd181f17b69213464f6d05f3d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d78d56c43ef3768183e8370e7367b162700e049,37a2042748bc880df03ff8315db86ed82991fbb8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d78d56c43ef3768183e8370e7367b162700e049,b78b728e21c32ec4c330b299f657fb1eb02dffc2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b343252d6f536203dd0660f676190dcbf6d2ecdc"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3f6d7f8a5416d852648d15a05e895f1195ee8a85"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.114,6.13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15ed8a9b7c63e9171f5139a6aaa1ffb61809861f,5c03da745171485fd181f17b69213464f6d05f3d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d78d56c43ef3768183e8370e7367b162700e049,37a2042748bc880df03ff8315db86ed82991fbb8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1d78d56c43ef3768183e8370e7367b162700e049,b78b728e21c32ec4c330b299f657fb1eb02dffc2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b343252d6f536203dd0660f676190dcbf6d2ecdc"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3f6d7f8a5416d852648d15a05e895f1195ee8a85"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.114,6.13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T18:45:11.432087+00:00", "updated": "2026-10-23T18:45:11.432139+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}