Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-53174

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/06/2026
Last modified:
06/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ovl: keep err zero after successful ovl_cache_get()<br /> <br /> ovl_iterate_merged() stores PTR_ERR(cache) in err before checking<br /> IS_ERR(cache). On success err holds the truncated cache pointer and<br /> can be returned as a bogus non-zero error.<br /> <br /> The syzbot reproducer reaches this through overlay-on-overlay readdir:<br /> <br /> getdents64<br /> iterate_dir(outer overlay file)<br /> ovl_iterate_merged()<br /> ovl_cache_get()<br /> ovl_dir_read_merged()<br /> ovl_dir_read()<br /> iterate_dir(inner overlay file)<br /> ovl_iterate_merged()<br /> <br /> Only compute PTR_ERR(cache) on the error path.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.13 (excluding)
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools