PT-2025-18486 · Linux+2 · Linux Kernel+2
Published
2022-09-20
·
Updated
2025-07-10
·
CVE-2022-49769
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel has been resolved, specifically in the gfs2 module. The issue involves the
sb bsize shift field, which can be corrupted, leading to messy mount errors due to bad calculations. The field is always a fixed value based on the block size, so it can be checked to ensure it's the expected value. The vulnerability was tested using fuzzers, which scribble over sb bsize shift, and it was found that before the patch, a withdraw occurred with fatal metadata block errors and UBSAN complaints about shift-out-of-bounds. After the patch, the complaints don't appear, and the mount fails immediately with an explanation in dmesg.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse