SB2026062941 - Out-of-bounds read in Linux kernel ocfs2 dlm
Published: June 29, 2026
Security Bulletin ID
SB2026062941
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-53309)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to an out-of-bounds read in dlm_match_regions() when comparing local and remote regions. A remote attacker can trigger the vulnerable region comparison to disclose sensitive information, modify data, or cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b
- https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4
- https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845
- https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520
- https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194
- https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54
- https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52
- https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073