Out-of-bounds read in Linux kernel - CVE-2026-89588
Published: September 12, 2026
Vulnerability identifier: #VU149213
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89588
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89588
Install security update from vendor's repository.