{"id":"CVE-2026-53174","summary":"ovl: keep err zero after successful ovl_cache_get()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: keep err zero after successful ovl_cache_get()\n\novl_iterate_merged() stores PTR_ERR(cache) in err before checking\nIS_ERR(cache). On success err holds the truncated cache pointer and\ncan be returned as a bogus non-zero error.\n\nThe syzbot reproducer reaches this through overlay-on-overlay readdir:\n\n  getdents64\n    iterate_dir(outer overlay file)\n      ovl_iterate_merged()\n        ovl_cache_get()\n          ovl_dir_read_merged()\n            ovl_dir_read()\n              iterate_dir(inner overlay file)\n                ovl_iterate_merged()\n\nOnly compute PTR_ERR(cache) on the error path.","modified":"2026-07-02T03:51:47.134964594Z","published":"2026-06-25T08:38:51.366Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53174.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1711b6ed6953cee5940ca4c3a6e77f1b3798cee2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7051909a01bfb883bfa78b27514854068ac4b85"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53174.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53174"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d25e4b739f8378419f990983f2542160e79738c5"},{"fixed":"e7051909a01bfb883bfa78b27514854068ac4b85"},{"fixed":"1711b6ed6953cee5940ca4c3a6e77f1b3798cee2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53174.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53174.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}