CVE-2026-89680

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89680", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.748Z", "datePublished": "2026-09-11T19:46:03.468Z", "dateUpdated": "2026-10-30T12:32:39.849Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:32:39.849Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix nfsd_file leak on inter-server COPY setup failure\n\nWhen nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns\nnfserr_offload_denied directly, bypassing the out: label where\nrelease_copy_files() would drop the nf_dst reference taken by\nnfs4_preprocess_stateid_op(). Each failed inter-server COPY\nleaks one nfsd_file, pinning file/inode/dentry/vfsmount.\n\nFix by setting status and jumping to out: instead of returning\ndirectly."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - nfsd's NFSv4.2 OP_COPY is reached over TCP/2049: svc_recv to nfsd_dispatch to nfsd4_proc_compound to nfsd4_copy to nfsd4_setup_inter_ssc. A remote client triggers the leak with a COMPOUND; no local access to the server is required.\nAC:L - Once inter-server COPY offload is enabled, the attacker controls every trigger: async COPY on the wire, a valid dest write stateid, and a source nl4_server that makes nfsd4_interssc_connect fail (bad uaddr/netid or failed mount). No race or attacker-uncontrollable layout is required.\nPR:N - Under default AUTH_SYS, EXCHANGE_ID/CREATE_SESSION and OPEN verify no secret; a remote client permitted by the export asserts a UID and obtains write stateids. This matches PR:N on the same nfsd4_copy path (CVE-2024-53073, CVE-2024-50241).\nUI:N - The attacker's own NFSv4.2 COMPOUND traffic drives nfsd4_copy; no administrator or local user on the server must mount, open a file, or otherwise interact beyond nfsd already serving an export.\nS:U - The leaked nfsd_file reference pins file/inode/dentry/vfsmount inside the NFS server kernel's own security authority; there is no VM, IOMMU, or sandbox boundary crossing.\nC:N - The defect only skips nfsd_file_put() on an extra filecache reference taken by nfs4_preprocess_stateid_op(); there is no out-of-bounds read, use-after-free, or other disclosure of kernel memory to the client.\nI:N - COPY setup fails before nfsd_copy_range, so no file data is modified; the leaked reference is not attacker-controlled reused memory and yields no write or control-flow primitive.\nA:H - Each failed inter-server COPY permanently leaks one nfsd_file ref, pinning the dest file/inode/dentry/vfsmount. Repeating against many created-then-unlinked files unbounded-pins slab and inodes and blocks umount, enabling remote kernel memory exhaustion and NFS server DoS."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4proc.c"], "versions": [{"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "d15f76fddc5d0215db5f18851048376a1ea79bd6", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "eb22420e5bd6eb3afa1f840036bb08a7ac90db76", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "94c28af6fd89cb204975e49b824f8ee521bb84e9", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "ab949252fdf102ae74329a0caa7995a849d0dafa", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "424d5c95108a4809b832cb0a312c61de4aec0078", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "6ed8d6de7ec90c4ba84eb82673058f506e5777fd", "status": "affected", "versionType": "git"}, {"version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "lessThan": "88a76145451d703eedd867b5989bf73d17340399", "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/nfs4proc.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "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", "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": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.160"}, {"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d15f76fddc5d0215db5f18851048376a1ea79bd6"}, {"url": "https://git.kernel.org/stable/c/eb22420e5bd6eb3afa1f840036bb08a7ac90db76"}, {"url": "https://git.kernel.org/stable/c/94c28af6fd89cb204975e49b824f8ee521bb84e9"}, {"url": "https://git.kernel.org/stable/c/ab949252fdf102ae74329a0caa7995a849d0dafa"}, {"url": "https://git.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab"}, {"url": "https://git.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078"}, {"url": "https://git.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fd"}, {"url": "https://git.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399"}], "title": "nfsd: fix nfsd_file leak on inter-server COPY setup failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4proc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d15f76fddc5d0215db5f18851048376a1ea79bd6", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "eb22420e5bd6eb3afa1f840036bb08a7ac90db76", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "94c28af6fd89cb204975e49b824f8ee521bb84e9", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "ab949252fdf102ae74329a0caa7995a849d0dafa", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "424d5c95108a4809b832cb0a312c61de4aec0078", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "6ed8d6de7ec90c4ba84eb82673058f506e5777fd", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}, {"lessThan": "88a76145451d703eedd867b5989bf73d17340399", "status": "affected", "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4proc.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": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "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", "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 nfsd_file leak on inter-server COPY setup failure\n\nWhen nfsd4_setup_inter_ssc() fails, nfsd4_copy() returns\nnfserr_offload_denied directly, bypassing the out: label where\nrelease_copy_files() would drop the nf_dst reference taken by\nnfs4_preprocess_stateid_op(). Each failed inter-server COPY\nleaks one nfsd_file, pinning file/inode/dentry/vfsmount.\n\nFix by setting status and jumping to out: instead of returning\ndirectly."}], "id": "CVE-2026-89680", "lastModified": "2026-10-30T13:20:25.993", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:54.790", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/94c28af6fd89cb204975e49b824f8ee521bb84e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab949252fdf102ae74329a0caa7995a849d0dafa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d15f76fddc5d0215db5f18851048376a1ea79bd6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eb22420e5bd6eb3afa1f840036bb08a7ac90db76"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel nfsd: Denial of Service via resource leak during inter-server COPY setup", "id": "2532302", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532302"}, "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-911", "details": ["A flaw was found in the Linux kernel's nfsd component. This vulnerability occurs when an inter-server COPY operation fails during its setup phase, leading to improper resource cleanup. Consequently, each failed operation results in a memory leak, consuming system resources. A remote attacker could repeatedly trigger these failures, potentially leading to resource exhaustion and a Denial of Service (DoS) on the affected system."], "name": "CVE-2026-89680", "public_date": "2026-09-11T19:46:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89680\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89680\nhttps://git.kernel.org/stable/c/1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab\nhttps://git.kernel.org/stable/c/424d5c95108a4809b832cb0a312c61de4aec0078\nhttps://git.kernel.org/stable/c/6ed8d6de7ec90c4ba84eb82673058f506e5777fd\nhttps://git.kernel.org/stable/c/88a76145451d703eedd867b5989bf73d17340399"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce0887ac96d35c7105090e166bb0807dc0a0e838,1a6a41b848455bf6ba2c9da2dfb0730e608ce7ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce0887ac96d35c7105090e166bb0807dc0a0e838,424d5c95108a4809b832cb0a312c61de4aec0078)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce0887ac96d35c7105090e166bb0807dc0a0e838,6ed8d6de7ec90c4ba84eb82673058f506e5777fd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce0887ac96d35c7105090e166bb0807dc0a0e838,88a76145451d703eedd867b5989bf73d17340399)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"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": "5.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T05:45:09.505681+00:00", "updated": "2026-09-15T21:00:17.847749+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}