PT-2026-37621 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-07 · CVE-2026-43281

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description An out-of-bounds access issue exists in the fw mbox index xlate() function. This occurs when #mbox-cells is set to 0 in the device tree and the mailbox controller lacks fw xlate and of xlate function pointers, leading the system to use fw mbox index xlate() by default without proper bounds checking.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-43281

Affected Products

Linux Kernel

References · 16

• https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43281 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43281 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43281 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43281 · Vendor Advisory
• https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43281 · Vendor Advisory
• https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab · Patch
• https://ubuntu.com/security/CVE-2026-43281 · Vendor Advisory
• https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43281 · Security Note
• https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f · Patch
• https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d · Patch
• https://git.kernel.org/linus/fcd7f96c783626c07ee3ed75fa3739a8a2052310 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43281 · Note