{"id":"CVE-2026-97561","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\n\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all fi…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\n\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all fi…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-708"],"vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e1b74f8f8c1d13190b09fe623b729d36b7ac22a8","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 18a72975e9f35aadecc75b031f693f2d1f49308f","Linux < 7.2.7","Linux (all versions)"],"published":"2026-09-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:09.033","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97561","references":[{"url":"https://git.kernel.org/stable/c/18a72975e9f35aadecc75b031f693f2d1f49308f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6ac7a29691558bed18e2df1780636b8aa0fd13d5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e1b74f8f8c1d13190b09fe623b729d36b7ac22a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97561.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97561"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541172"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97561"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97561"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97561.mbox"},{"url":"https://git.kernel.org/stable/c/be6eccccec867c22d7c65fab4ea4e91ec3d5b8c6"},{"url":"https://git.kernel.org/stable/c/bc35de451c128d399ad185d6269f8847e97cd1c9"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00206,"epssPercentile":0.10587,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.915Z","slug":"CVE-2026-97561","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\n\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all files to appear owned by the specified\nuser/group.  However, several code paths unconditionally called\nsid_to_id() to overwrite cf_uid/cf_gid with server-provided values,\nignoring the administrator's explicit override:\n\n  - smb311_posix_info_to_fattr() (stat via POSIX extensions)\n  - cifs_posix_to_fattr() (readdir via POSIX extensions)\n  - parse_sec_desc() (CIFS ACL ownership mapping)\n\nThis allowed an untrusted server to dictate local file ownership even\nwhen the mount was configured to force specific uid/gid values.\n\nFix all three call sites to check CIFS_MOUNT_OVERR_UID and\nCIFS_MOUNT_OVERR_GID before calling sid_to_id(), following the\nsame pattern already used by cifs_unix_basic_to_fattr() for unix\nextensions.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97561.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212341,"id":"CVE-2026-97561","ts":1790668154041,"field":"cvss","old":null,"new":"7"},{"seq":212340,"id":"CVE-2026-97561","ts":1790668154041,"field":"severity","old":"none","new":"high"}]}