SB20260816359 - Out-of-bounds read in Linux kernel ocfs2
Published: August 16, 2026
Security Bulletin ID
SB20260816359
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-72162)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in ocfs2_sum_rightmost_rec when processing a corrupted inode embedded extent list from disk. A local user can provide a crafted ocfs2 filesystem image with invalid extent list metadata to cause a denial of service.
The issue is triggered when l_next_free_rec is zero or exceeds l_count in the embedded extent list of an inode.
Remediation
Install update from vendor's website.