SB2026050751 - Out-of-bounds read in Linux kernel GHES/CPER ARM processor CPER record parser

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Main Vulnerability Database SB2026050751

SB2026050751 - Out-of-bounds read in Linux kernel GHES/CPER ARM processor CPER record parser

Published: May 7, 2026

Security Bulletin ID SB2026050751
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-43266)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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/E:U/U:Clear


The vulnerability allows a local attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in the GHES/CPER ARM processor CPER record parser when processing a firmware-generated ARM processor CPER record with an oversized section length. A local attacker can provide a crafted CPER record to disclose sensitive information.

The issue can cause the kernel to dump data beyond the firmware memory-mapped area.


Remediation

Install update from vendor's website.

References