{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89697", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.750Z", "datePublished": "2026-09-11T19:46:15.772Z", "dateUpdated": "2026-09-11T19:46:15.772Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:15.772Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()\n\nThe BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare()\ncan inspect the dentry. This causes nfsd_setattr() to skip\nfh_want_write(), so notify_change() runs without a mount write\nreference.\n\nAdd the missing fh_want_write() call after the early fh_verify()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfsproc.c"], "versions": [{"version": "cc265089ce1b176dde963c74b53593446ee7f99a", "lessThan": "15ca3b64a69caa6194bed8f98a20ed90a11c11dd", "status": "affected", "versionType": "git"}, {"version": "cc265089ce1b176dde963c74b53593446ee7f99a", "lessThan": "533964d420d385e11b08dd4c56c66ef5dcccaf08", "status": "affected", "versionType": "git"}, {"version": "cc265089ce1b176dde963c74b53593446ee7f99a", "lessThan": "c4a409b86a92815181a8e9395c6bf1696ad19175", "status": "affected", "versionType": "git"}, {"version": "cc265089ce1b176dde963c74b53593446ee7f99a", "lessThan": "4e475be769aa9f7a2c1ce55a2b8592cfccacddcc", "status": "affected", "versionType": "git"}, {"version": "1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8", "status": "affected", "versionType": "git"}, {"version": "3.18.46", "lessThan": "3.19", "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/nfsproc.c"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "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": "4.2", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.3-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.46"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd"}, {"url": "https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08"}, {"url": "https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175"}, {"url": "https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc"}], "title": "nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfsproc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "15ca3b64a69caa6194bed8f98a20ed90a11c11dd", "status": "affected", "version": "cc265089ce1b176dde963c74b53593446ee7f99a", "versionType": "git"}, {"lessThan": "533964d420d385e11b08dd4c56c66ef5dcccaf08", "status": "affected", "version": "cc265089ce1b176dde963c74b53593446ee7f99a", "versionType": "git"}, {"lessThan": "c4a409b86a92815181a8e9395c6bf1696ad19175", "status": "affected", "version": "cc265089ce1b176dde963c74b53593446ee7f99a", "versionType": "git"}, {"lessThan": "4e475be769aa9f7a2c1ce55a2b8592cfccacddcc", "status": "affected", "version": "cc265089ce1b176dde963c74b53593446ee7f99a", "versionType": "git"}, {"status": "affected", "version": "1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8", "versionType": "git"}, {"lessThan": "3.19", "status": "affected", "version": "3.18.46", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfsproc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.2"}, {"lessThan": "4.2", "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: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()\n\nThe BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare()\ncan inspect the dentry. This causes nfsd_setattr() to skip\nfh_want_write(), so notify_change() runs without a mount write\nreference.\n\nAdd the missing fh_want_write() call after the early fh_verify()."}], "id": "CVE-2026-89697", "lastModified": "2026-09-11T20:19:56.843", "metrics": {}, "published": "2026-09-11T20:19:56.843", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: NFS daemon bypasses write verification during attribute setting", "id": "2532144", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532144"}, "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-911", "details": ["A flaw was found in the Linux kernel's Network File System Daemon (nfsd). When setting file attributes using `nfsd_proc_setattr()`, a specific code path (`BOTH_TIME_SET` branch) prematurely verifies file handles. This bypasses a critical write verification step (`fh_want_write()`), allowing file attribute changes to proceed without a proper mount write reference. This could lead to unauthorized modification of file metadata or content, potentially impacting data integrity."], "name": "CVE-2026-89697", "public_date": "2026-09-11T19:46:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89697\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89697\nhttps://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd\nhttps://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc\nhttps://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08\nhttps://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175"], "threat_severity": "Important"}

{}