PT-2026-37606 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-08 · CVE-2026-43266

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the GHES/CPER logic of the Linux kernel regarding the handling of ARM processor CPER records. The system fails to detect when the section length is excessively large. If the firmware provides a record with an oversized section length, the kernel trusts this value, which can lead to a memory dump that extends beyond the firmware memory-mapped area. This occurs specifically when the ERR INFO NUM variable is too large.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-43266

Affected Products

Linux Kernel

References · 18

• https://git.kernel.org/stable/c/ca2aad8771aa9091bc9e42e7d546bd40b72ddcd4 · Patch
• https://git.kernel.org/stable/c/a68d22902a6916e10ee235fee609239004e129d0 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43266 · Vendor Advisory
• https://git.kernel.org/stable/c/be10c1bdf64a39832998f54900aa309b3917abcf · Patch
• https://git.kernel.org/stable/c/c80113dcfc807308f5ab33847fae77e07531aeb8 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43266 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43266 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43266 · Vendor Advisory
• https://git.kernel.org/stable/c/64eb63f573f497553e1a0c388bbcdd639e0f0704 · Patch
• https://git.kernel.org/stable/c/25b290624b0e3d2f0f90238709ee0b6009b9fde8 · Patch
• https://git.kernel.org/stable/c/45766863baf899059e75595dd3cb1116467f2095 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43266 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43266 · Security Note
• https://ubuntu.com/security/CVE-2026-43266 · Vendor Advisory
• https://git.kernel.org/stable/c/eae21beecb95a3b69ee5c38a659f774e171d730e · Patch