CVE-2026-99137

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99137", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.395Z", "datePublished": "2026-10-28T10:34:49.266Z", "dateUpdated": "2026-10-28T10:34:49.266Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:34:49.266Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: don't update i_size in cifs_do_truncate without a cached handle\n\nIf find_writable_file() returns null, cifs_file_flush will return\n0 without issuing set_file_size, and the outer 'if (!rc)' block\nwill set i_size to 0 before telling the server to truncate. If\nthe cifs_open() then fails, the inode will have size 0, while\nthe server file is unchanged.\n\nMove the netfs_resize_file() and cifs_setsize() into the 'if\n(cfile)', so they only run after a successful set_file_size.\n\nIn the no-handle else branch, evict stale pages with\ntruncate_inode_pages before the O_TRUNC open to dispose of old\ncache pages, and let the open response set the i_size."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/file.c"], "versions": [{"version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "lessThan": "04d020b3d0b58a1b7e116900e4095b96a7f4e11a", "status": "affected", "versionType": "git"}, {"version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "lessThan": "88a51743cd8094b76fd910f53f718747c7729cc8", "status": "affected", "versionType": "git"}, {"version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "lessThan": "fe39cd9d48f2346605f3746e0cc19e89d5f373eb", "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/smb/client/file.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.13", "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": "6.18", "versionEndExcluding": "6.18.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/04d020b3d0b58a1b7e116900e4095b96a7f4e11a"}, {"url": "https://git.kernel.org/stable/c/88a51743cd8094b76fd910f53f718747c7729cc8"}, {"url": "https://git.kernel.org/stable/c/fe39cd9d48f2346605f3746e0cc19e89d5f373eb"}], "title": "cifs: don't update i_size in cifs_do_truncate without a cached handle", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "04d020b3d0b58a1b7e116900e4095b96a7f4e11a", "status": "affected", "version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "versionType": "git"}, {"lessThan": "88a51743cd8094b76fd910f53f718747c7729cc8", "status": "affected", "version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "versionType": "git"}, {"lessThan": "fe39cd9d48f2346605f3746e0cc19e89d5f373eb", "status": "affected", "version": "110fee6b9bb58a5c50047fc2594d415f741b591e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/file.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.59", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.13", "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\ncifs: don't update i_size in cifs_do_truncate without a cached handle\n\nIf find_writable_file() returns null, cifs_file_flush will return\n0 without issuing set_file_size, and the outer 'if (!rc)' block\nwill set i_size to 0 before telling the server to truncate. If\nthe cifs_open() then fails, the inode will have size 0, while\nthe server file is unchanged.\n\nMove the netfs_resize_file() and cifs_setsize() into the 'if\n(cfile)', so they only run after a successful set_file_size.\n\nIn the no-handle else branch, evict stale pages with\ntruncate_inode_pages before the O_TRUNC open to dispose of old\ncache pages, and let the open response set the i_size."}], "id": "CVE-2026-99137", "lastModified": "2026-10-28T11:17:33.630", "metrics": {}, "published": "2026-10-28T11:17:33.630", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/04d020b3d0b58a1b7e116900e4095b96a7f4e11a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88a51743cd8094b76fd910f53f718747c7729cc8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe39cd9d48f2346605f3746e0cc19e89d5f373eb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cifs: don't update i_size in cifs_do_truncate without a cached handle", "id": "2562650", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2562650"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L", "status": "draft"}, "cwe": "CWE-393", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncifs: don't update i_size in cifs_do_truncate without a cached handle\nIf find_writable_file() returns null, cifs_file_flush will return\n0 without issuing set_file_size, and the outer 'if (!rc)' block\nwill set i_size to 0 before telling the server to truncate. If\nthe cifs_open() then fails, the inode will have size 0, while\nthe server file is unchanged.\nMove the netfs_resize_file() and cifs_setsize() into the 'if\n(cfile)', so they only run after a successful set_file_size.\nIn the no-handle else branch, evict stale pages with\ntruncate_inode_pages before the O_TRUNC open to dispose of old\ncache pages, and let the open response set the i_size."], "name": "CVE-2026-99137", "public_date": "2026-10-28T10:34:49Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99137\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99137\nhttps://git.kernel.org/stable/c/04d020b3d0b58a1b7e116900e4095b96a7f4e11a\nhttps://git.kernel.org/stable/c/88a51743cd8094b76fd910f53f718747c7729cc8\nhttps://git.kernel.org/stable/c/fe39cd9d48f2346605f3746e0cc19e89d5f373eb"], "threat_severity": "Low"}

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