SB2026092524 - Out-of-bounds write in Linux kernel btrfs
Published: September 25, 2026
Security Bulletin ID
SB2026092524
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) Out-of-bounds write (CVE-ID: CVE-2026-97415)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform an out-of-bounds write.
The vulnerability exists due to improper validation of root reference name lengths in Btrfs ROOT_REF and ROOT_BACKREF item handling when processing malformed Btrfs root reference items. A local user can invoke BTRFS_IOC_GET_SUBVOL_INFO on a filesystem containing a malformed ROOT_BACKREF item to perform an out-of-bounds write.
Remediation
Install update from vendor's website.