Vulnerability Details CVE-2026-53174
In the Linux kernel, the following vulnerability has been resolved:
ovl: keep err zero after successful ovl_cache_get()
ovl_iterate_merged() stores PTR_ERR(cache) in err before checking
IS_ERR(cache). On success err holds the truncated cache pointer and
can be returned as a bogus non-zero error.
The syzbot reproducer reaches this through overlay-on-overlay readdir:
getdents64
iterate_dir(outer overlay file)
ovl_iterate_merged()
ovl_cache_get()
ovl_dir_read_merged()
ovl_dir_read()
iterate_dir(inner overlay file)
ovl_iterate_merged()
Only compute PTR_ERR(cache) on the error path.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.9%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2026-53174
-
cpe:2.3:o:linux:linux_kernel:6.19
-
cpe:2.3:o:linux:linux_kernel:6.19.1
-
cpe:2.3:o:linux:linux_kernel:6.19.10
-
cpe:2.3:o:linux:linux_kernel:6.19.11
-
cpe:2.3:o:linux:linux_kernel:6.19.12
-
cpe:2.3:o:linux:linux_kernel:6.19.13
-
cpe:2.3:o:linux:linux_kernel:6.19.14
-
cpe:2.3:o:linux:linux_kernel:6.19.3
-
cpe:2.3:o:linux:linux_kernel:6.19.4
-
cpe:2.3:o:linux:linux_kernel:6.19.6
-
cpe:2.3:o:linux:linux_kernel:6.19.7
-
cpe:2.3:o:linux:linux_kernel:6.19.8
-
cpe:2.3:o:linux:linux_kernel:6.19.9
-
cpe:2.3:o:linux:linux_kernel:7.0
-
cpe:2.3:o:linux:linux_kernel:7.0.1
-
cpe:2.3:o:linux:linux_kernel:7.0.10
-
cpe:2.3:o:linux:linux_kernel:7.0.2
-
cpe:2.3:o:linux:linux_kernel:7.0.3
-
cpe:2.3:o:linux:linux_kernel:7.0.5
-
cpe:2.3:o:linux:linux_kernel:7.0.6
-
cpe:2.3:o:linux:linux_kernel:7.1