SB20260828113 - Out-of-bounds read in Linux kernel cxl driver
Published: August 28, 2026
Security Bulletin ID
SB20260828113
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-2026-80662)
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:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the cxl RAS header log handling and trace event path when processing CXL RAS error data. A local user can trigger CXL error handling to copy kernel stack data into the trace event ring buffer and disclose sensitive information.
Userspace can read the exposed trace event data via tracefs.
Remediation
Install update from vendor's website.