{"id":"CVE-2026-53174","title":"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)","summary":"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…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.19, < 7.0.13","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.13"],"published":"2026-06-25","updated":"2026-07-06","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53174","references":[{"url":"https://git.kernel.org/stable/c/1711b6ed6953cee5940ca4c3a6e77f1b3798cee2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7051909a01bfb883bfa78b27514854068ac4b85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.0012,"epssPercentile":0.02136,"ingestedAt":"2026-07-06T17:44:51.373Z","slug":"CVE-2026-53174","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 6.19, < 7.0.13`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.13`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}