Improper input validation in Linux kernel - CVE-2026-43129
Published: May 7, 2026
Vulnerability identifier: #VU130618
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43129
CWE-ID: CWE-20
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 improper input validation in ima_restore_measurement_list() when restoring the previous kernel's IMA measurement buffer during kexec boot. A local user can boot a second-stage kernel with a limiting command line such as "mem=" to cause a denial of service.
This issue occurs on x86_64 systems during early restore of the measurement list.
How to mitigate CVE-2026-43129
Install security update from vendor's repository.