Out-of-bounds read in Linux kernel - CVE-2026-43266
Published: May 7, 2026
Vulnerability identifier: #VU130443
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-43266
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-43266
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/25b290624b0e3d2f0f90238709ee0b6009b9fde8
- https://git.kernel.org/stable/c/45766863baf899059e75595dd3cb1116467f2095
- https://git.kernel.org/stable/c/64eb63f573f497553e1a0c388bbcdd639e0f0704
- https://git.kernel.org/stable/c/a68d22902a6916e10ee235fee609239004e129d0
- https://git.kernel.org/stable/c/be10c1bdf64a39832998f54900aa309b3917abcf
- https://git.kernel.org/stable/c/c80113dcfc807308f5ab33847fae77e07531aeb8
- https://git.kernel.org/stable/c/ca2aad8771aa9091bc9e42e7d546bd40b72ddcd4
- https://git.kernel.org/stable/c/eae21beecb95a3b69ee5c38a659f774e171d730e