SB20260912191 - Out-of-bounds read in Linux kernel acpi apei driver
Published: September 12, 2026
Security Bulletin ID
SB20260912191
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-2026-89588)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read past a CPER section.
The vulnerability exists due to incorrect length accounting in ghes_handle_arm_hw_error() when processing ARM hardware error sections. A local user can trigger parsing of a CPER section with a large err_info_num relative to error_data_length to read past a CPER section.
Remediation
Install update from vendor's website.