{"id":"CVE-2026-99137","aliases":[],"title":"cifs: don't update i_size in cifs_do_truncate without a cached handle","titleSource":"Linux","descriptionSource":"Linux","products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"110fee6b9bb58a5c50047fc2594d415f741b591e","status":"affected","lessThan":"04d020b3d0b58a1b7e116900e4095b96a7f4e11a","versionType":"git"},{"version":"110fee6b9bb58a5c50047fc2594d415f741b591e","status":"affected","lessThan":"88a51743cd8094b76fd910f53f718747c7729cc8","versionType":"git"},{"version":"110fee6b9bb58a5c50047fc2594d415f741b591e","status":"affected","lessThan":"fe39cd9d48f2346605f3746e0cc19e89d5f373eb","versionType":"git"}],"defaultStatus":"unaffected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99137"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99137"}],"remediation":[],"description":"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.","severity":"unknown","score":null,"published":"2026-10-28T10:34:49.266Z","modified":"2026-10-28T10:34:49.266Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://git.kernel.org/stable/c/04d020b3d0b58a1b7e116900e4095b96a7f4e11a","https://git.kernel.org/stable/c/88a51743cd8094b76fd910f53f718747c7729cc8","https://git.kernel.org/stable/c/fe39cd9d48f2346605f3746e0cc19e89d5f373eb"],"sources":[{"name":"CVE","id":"CVE-2026-99137","modified":"2026-10-28T10:34:49.266Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99137"}],"assessments":[],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T19:10:31.056Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}