{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89694", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.749Z", "datePublished": "2026-09-11T19:46:13.519Z", "dateUpdated": "2026-09-11T19:46:13.519Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:13.519Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: check client ownership when cancelling a copy-notify stateid\n\nOn the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the\ntarget cpntf state without checking ownership. The lookup key\nst->si_opaque.so_id is allocated cyclically (guessable) and the embedded\nclientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated\nNFSv4.2 client could cancel and free another client's copy-notify\nstateid.\n\nCompare the creating clientid recorded in state->cp_p_clid against the\nrequesting client's cl_clientid and return nfserr_bad_stateid on a\nmismatch instead of freeing the entry."}], "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": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "b1eca07303594ca27f5dc360a6946bd7e1f5b04c", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "b42dc26a14b4ad5d6daaada11ec4c70744141c25", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "d801906165cb5cc250d5cbe44935594e170be3e2", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf", "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/nfs4state.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "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": "5.6", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c"}, {"url": "https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25"}, {"url": "https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"}, {"url": "https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"}], "title": "nfsd: check client ownership when cancelling a copy-notify stateid", "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": "b1eca07303594ca27f5dc360a6946bd7e1f5b04c", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "b42dc26a14b4ad5d6daaada11ec4c70744141c25", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "d801906165cb5cc250d5cbe44935594e170be3e2", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}]}, {"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": "5.6"}, {"lessThan": "5.6", "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: check client ownership when cancelling a copy-notify stateid\n\nOn the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the\ntarget cpntf state without checking ownership. The lookup key\nst->si_opaque.so_id is allocated cyclically (guessable) and the embedded\nclientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated\nNFSv4.2 client could cancel and free another client's copy-notify\nstateid.\n\nCompare the creating clientid recorded in state->cp_p_clid against the\nrequesting client's cl_clientid and return nfserr_bad_stateid on a\nmismatch instead of freeing the entry."}], "id": "CVE-2026-89694", "lastModified": "2026-09-11T20:19:56.490", "metrics": {}, "published": "2026-09-11T20:19:56.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel (nfsd): Denial of Service via improper ownership check in copy-notify stateid cancellation", "id": "2532327", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532327"}, "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-639", "details": ["A flaw was found in the Linux kernel's NFSv4.2 server (nfsd). An authenticated NFSv4.2 client could exploit a vulnerability in the `manage_cpntf_state()` function by guessing a state identifier. This improper ownership check allows the client to cancel and free another client's copy-notify stateid, leading to a Denial of Service (DoS) for the legitimate client."], "name": "CVE-2026-89694", "public_date": "2026-09-11T19:46:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89694\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89694\nhttps://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf\nhttps://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c\nhttps://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25\nhttps://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"], "threat_severity": "Important"}

{}