{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89703", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.750Z", "datePublished": "2026-09-11T19:46:20.280Z", "dateUpdated": "2026-09-11T19:46:20.280Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:20.280Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations\n\nnfsd4_drop_revoked_stid() handles FREE_STATEID for admin-revoked\ndelegations but does not set SC_STATUS_FREED before releasing cl_lock.\nrevoke_delegation() uses this flag to detect whether FREE_STATEID has\nalready processed the delegation -- without it, the freed delegation is\nadded to cl_revoked via list_add(), producing a use-after-free when\ncl_revoked is later traversed in __destroy_client().\n\nThe SC_STATUS_REVOKED path in nfsd4_free_stateid() (line 7983) already\nsets SC_STATUS_FREED correctly. Apply the same pattern to the\nSC_STATUS_ADMIN_REVOKED path in nfsd4_drop_revoked_stid()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4state.c"], "versions": [{"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "lessThan": "d832a0587528853d45481d1faf75d4b5d062adaf", "status": "affected", "versionType": "git"}, {"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "lessThan": "1e4795766719ffd74b8cf0f2fde4a1350f8326bf", "status": "affected", "versionType": "git"}, {"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "lessThan": "a6d89032e5c6620d5bb44582a72555ce07bf1c2e", "status": "affected", "versionType": "git"}, {"version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "lessThan": "650d370cfbc66a96dd14d517bd704689b5bda4e5", "status": "affected", "versionType": "git"}, {"version": "967faa26f313a62e7bebc55d5b8122eaee43b929", "status": "affected", "versionType": "git"}, {"version": "6.11.6", "lessThan": "6.12", "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/nfsd/nfs4state.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "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": "6.12", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf"}, {"url": "https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf"}, {"url": "https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e"}, {"url": "https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5"}], "title": "nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4state.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d832a0587528853d45481d1faf75d4b5d062adaf", "status": "affected", "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "versionType": "git"}, {"lessThan": "1e4795766719ffd74b8cf0f2fde4a1350f8326bf", "status": "affected", "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "versionType": "git"}, {"lessThan": "a6d89032e5c6620d5bb44582a72555ce07bf1c2e", "status": "affected", "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "versionType": "git"}, {"lessThan": "650d370cfbc66a96dd14d517bd704689b5bda4e5", "status": "affected", "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a", "versionType": "git"}, {"status": "affected", "version": "967faa26f313a62e7bebc55d5b8122eaee43b929", "versionType": "git"}, {"lessThan": "6.12", "status": "affected", "version": "6.11.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4state.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "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: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations\n\nnfsd4_drop_revoked_stid() handles FREE_STATEID for admin-revoked\ndelegations but does not set SC_STATUS_FREED before releasing cl_lock.\nrevoke_delegation() uses this flag to detect whether FREE_STATEID has\nalready processed the delegation -- without it, the freed delegation is\nadded to cl_revoked via list_add(), producing a use-after-free when\ncl_revoked is later traversed in __destroy_client().\n\nThe SC_STATUS_REVOKED path in nfsd4_free_stateid() (line 7983) already\nsets SC_STATUS_FREED correctly. Apply the same pattern to the\nSC_STATUS_ADMIN_REVOKED path in nfsd4_drop_revoked_stid()."}], "id": "CVE-2026-89703", "lastModified": "2026-09-11T20:19:57.537", "metrics": {}, "published": "2026-09-11T20:19:57.537", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Kernel: Use-after-free in nfsd due to incorrect state handling in nfsd4_drop_revoked_stid", "id": "2532470", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532470"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the `nfsd` component of the Linux kernel. The `nfsd4_drop_revoked_stid()` function, which handles admin-revoked delegations, fails to correctly set a status flag before releasing a lock. This oversight can lead to a use-after-free condition when a freed delegation is incorrectly added to a list, potentially allowing an attacker to cause a denial of service or execute arbitrary code."], "name": "CVE-2026-89703", "public_date": "2026-09-11T19:46:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89703\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89703\nhttps://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf\nhttps://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5\nhttps://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e\nhttps://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf"], "threat_severity": "Important"}

{"created": "2026-09-12T10:00:08.635489+00:00", "updated": "2026-09-13T01:15:14.624158+00:00", "vendors": []}