CVE-2026-89701

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89701", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.750Z", "datePublished": "2026-09-11T19:46:18.807Z", "dateUpdated": "2026-10-19T08:51:14.339Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:51:14.339Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: validate nseconds in TIME_DELEG decode paths\n\nThe xdrgen-based TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode arms\nstore a raw uint32_t nseconds directly into tv_nsec without enforcing\nnseconds < NSEC_PER_SEC. The legacy nfsd4_decode_nfstime4 has this\ncheck but the TIME_DELEG paths do not. A malformed timespec can\npropagate through notify_change() to disk.\n\nAdd range checks in both nfs4xdr.c (SETATTR path) and\nnfs4callback.c (CB_GETATTR path)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4callback.c", "fs/nfsd/nfs4xdr.c"], "versions": [{"version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "lessThan": "7e7b93da7fa2e77f977096251899d1410986adf6", "status": "affected", "versionType": "git"}, {"version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "lessThan": "5eb489831a9fd4754f4baf26e6989efb66ce104c", "status": "affected", "versionType": "git"}, {"version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "lessThan": "0f4a767340fad392bd656115b8752005518c9065", "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/nfs4callback.c", "fs/nfsd/nfs4xdr.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "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": "6.14", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6"}, {"url": "https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c"}, {"url": "https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065"}], "title": "nfsd: validate nseconds in TIME_DELEG decode paths", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4callback.c", "fs/nfsd/nfs4xdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7e7b93da7fa2e77f977096251899d1410986adf6", "status": "affected", "version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "versionType": "git"}, {"lessThan": "5eb489831a9fd4754f4baf26e6989efb66ce104c", "status": "affected", "version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "versionType": "git"}, {"lessThan": "0f4a767340fad392bd656115b8752005518c9065", "status": "affected", "version": "6ae30d6eb26bce02c48c60074b4306270e2434c1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4callback.c", "fs/nfsd/nfs4xdr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "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: validate nseconds in TIME_DELEG decode paths\n\nThe xdrgen-based TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode arms\nstore a raw uint32_t nseconds directly into tv_nsec without enforcing\nnseconds < NSEC_PER_SEC. The legacy nfsd4_decode_nfstime4 has this\ncheck but the TIME_DELEG paths do not. A malformed timespec can\npropagate through notify_change() to disk.\n\nAdd range checks in both nfs4xdr.c (SETATTR path) and\nnfs4callback.c (CB_GETATTR path)."}], "id": "CVE-2026-89701", "lastModified": "2026-10-19T09:18:08.750", "metrics": {}, "published": "2026-09-11T20:19:57.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux Kernel: Data integrity issue in nfsd due to improper timestamp validation", "id": "2532154", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532154"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["A flaw was found in the Linux kernel's Network File System Daemon (nfsd). The TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode paths do not properly validate the nanosecond (nseconds) value in timestamps. This allows a remote attacker to provide a malformed timestamp, which can then be written to disk, potentially leading to data integrity issues or unexpected system behavior."], "name": "CVE-2026-89701", "public_date": "2026-09-11T19:46:18Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89701\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89701\nhttps://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065\nhttps://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c\nhttps://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6ae30d6eb26bce02c48c60074b4306270e2434c1,7e7b93da7fa2e77f977096251899d1410986adf6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6ae30d6eb26bce02c48c60074b4306270e2434c1,5eb489831a9fd4754f4baf26e6989efb66ce104c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6ae30d6eb26bce02c48c60074b4306270e2434c1,0f4a767340fad392bd656115b8752005518c9065)"}}], "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": "semver", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"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": "2026-09-12T04:30:07.740318+00:00", "updated": "2026-09-15T20:00:08.108614+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}