{"id":"CVE-2026-99137","revision":"64de88e134904a99a87386cc06ecef46","records":[{"revision":"64de88e134904a99a87386cc06ecef46","observedAt":"2026-10-28T11:27:43.363+00:00","statement":{"source":"cve-program","id":"CVE-2026-99137","aliases":[],"title":"cifs: don't update i_size in cifs_do_truncate without a cached handle","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.","state":0,"publishedAt":"2026-10-28T10:34:49.266+00:00","modifiedAt":"2026-10-28T10:34:49.266+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/client/file.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"04d020b3d0b58a1b7e116900e4095b96a7f4e11a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"88a51743cd8094b76fd910f53f718747c7729cc8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"fe39cd9d48f2346605f3746e0cc19e89d5f373eb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/client/file.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.59\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/04d020b3d0b58a1b7e116900e4095b96a7f4e11a","https://git.kernel.org/stable/c/88a51743cd8094b76fd910f53f718747c7729cc8","https://git.kernel.org/stable/c/fe39cd9d48f2346605f3746e0cc19e89d5f373eb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99137","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99137","identifiers":["CVE-2026-99137"]},"retained":false,"historicalAffected":[]}],"coverage":[]}