SB20260918344 - Out-of-bounds read in Linux kernel ocfs2 cluster
Published: September 18, 2026
Security Bulletin ID
SB20260918344
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-90322)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read out-of-bounds memory.
The vulnerability exists due to an invalid node number being used as a heartbeat slot index in the OCFS2 heartbeat subsystem when resetting the local node configuration while heartbeat threads are running. A local user can reset the local node configuration while heartbeat threads are running to read out-of-bounds memory.
Remediation
Install update from vendor's website.