{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89681", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.748Z", "datePublished": "2026-09-11T19:46:04.121Z", "dateUpdated": "2026-09-11T19:46:04.121Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:04.121Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix layout fence worker double-reference race\n\nThe workqueue core clears WORK_STRUCT_PENDING before the callback\nis invoked, so delayed_work_pending() in lm_breaker_timedout() can\nreturn false while the fence worker is already running. This lets\nthe breaker take a duplicate sc_count reference and schedule a new\nworker that coalesces with the in-progress one. The extra reference\nis never put, leaking the layout stateid.\n\nReplace the racy delayed_work_pending() check with an\nls_fence_inflight boolean set atomically with\nrefcount_inc_not_zero() under ls_lock, and cleared under ls_lock\nbefore the final nfs4_put_stid() on the dispose path; the retry\npath intentionally retains it. Remove the self-rearm\nmod_delayed_work() at the top of the worker."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4layouts.c", "fs/nfsd/state.h"], "versions": [{"version": "f52792f484ba2316853736856dde19b7e7458861", "lessThan": "a278d361e0e8f242211891193d56483a7a9f47a8", "status": "affected", "versionType": "git"}, {"version": "f52792f484ba2316853736856dde19b7e7458861", "lessThan": "8580571227451384399b3fa53fcde19848c48e5a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4layouts.c", "fs/nfsd/state.h"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "7.1", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a278d361e0e8f242211891193d56483a7a9f47a8"}, {"url": "https://git.kernel.org/stable/c/8580571227451384399b3fa53fcde19848c48e5a"}], "title": "nfsd: fix layout fence worker double-reference race", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4layouts.c", "fs/nfsd/state.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a278d361e0e8f242211891193d56483a7a9f47a8", "status": "affected", "version": "f52792f484ba2316853736856dde19b7e7458861", "versionType": "git"}, {"lessThan": "8580571227451384399b3fa53fcde19848c48e5a", "status": "affected", "version": "f52792f484ba2316853736856dde19b7e7458861", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4layouts.c", "fs/nfsd/state.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nnfsd: fix layout fence worker double-reference race\n\nThe workqueue core clears WORK_STRUCT_PENDING before the callback\nis invoked, so delayed_work_pending() in lm_breaker_timedout() can\nreturn false while the fence worker is already running. This lets\nthe breaker take a duplicate sc_count reference and schedule a new\nworker that coalesces with the in-progress one. The extra reference\nis never put, leaking the layout stateid.\n\nReplace the racy delayed_work_pending() check with an\nls_fence_inflight boolean set atomically with\nrefcount_inc_not_zero() under ls_lock, and cleared under ls_lock\nbefore the final nfs4_put_stid() on the dispose path; the retry\npath intentionally retains it. Remove the self-rearm\nmod_delayed_work() at the top of the worker."}], "id": "CVE-2026-89681", "lastModified": "2026-09-11T20:19:54.917", "metrics": {}, "published": "2026-09-11T20:19:54.917", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8580571227451384399b3fa53fcde19848c48e5a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a278d361e0e8f242211891193d56483a7a9f47a8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Kernel: nfsd double-reference race leads to memory leak", "id": "2532389", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532389"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's nfsd component. A race condition in the layout fence worker can cause a double-reference to a layout stateid. This occurs because the workqueue core clears a pending flag prematurely, allowing a new worker to be scheduled while another is still active. The duplicate reference is not properly released, leading to a memory leak."], "name": "CVE-2026-89681", "public_date": "2026-09-11T19:46:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89681\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89681\nhttps://git.kernel.org/stable/c/8580571227451384399b3fa53fcde19848c48e5a\nhttps://git.kernel.org/stable/c/a278d361e0e8f242211891193d56483a7a9f47a8"], "threat_severity": "Moderate"}

{"created": "2026-09-12T07:30:10.434460+00:00", "updated": "2026-09-12T15:15:15.922531+00:00", "vendors": [], "weaknesses": ["CWE-362", "CWE-401", "CWE-772"]}