Out-of-bounds read in Linux kernel - CVE-2026-43172
Published: May 7, 2026
Vulnerability identifier: #VU130564
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43172
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 user to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in the SMEM parsing logic when processing firmware-reported LMAC configuration data. A local user can provide crafted firmware data to cause a denial of service.
Exploitation requires the firmware to report three LMACs, a condition that does not exist in hardware.
How to mitigate CVE-2026-43172
Install security update from vendor's repository.