SB2026042546 - Return of Wrong Status Code in Linux kernel btrfs
Published: April 25, 2026
Security Bulletin ID
SB2026042546
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Return of Wrong Status Code (CVE-ID: CVE-2026-31666)
CWE-ID: CWE-393 - Return of Wrong Status Code
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause extent tree corruption.
The vulnerability exists due to incorrect return value handling in lookup_extent_data_ref() when processing extent data reference lookups across leaf boundaries. A local user can trigger the function to return success for a non-matching key to cause extent tree corruption.
Remediation
Install update from vendor's website.