Improper control of a resource through its lifetime in Linux kernel - CVE-2026-64163
Published: July 20, 2026
Vulnerability identifier: #VU138463
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-2026-64163
CWE-ID: CWE-664
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 state reset in lib/tests/test_kprobes.c when running the kprobes sanity tests multiple times. A local user can trigger repeated test runs to cause a denial of service.
The issue occurs because static kprobe and kretprobe objects retain leftover address and flag data between test runs, which leads to failed re-registration and an eventual kernel crash.
How to mitigate CVE-2026-64163
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/08d355936fcf70c81c94f9fe7310450b65c53399
- https://git.kernel.org/stable/c/1c24cf1fd67f6702c719ab73499392cb7af956ae
- https://git.kernel.org/stable/c/96515819d79f356f40da5540968d838ea570fab9
- https://git.kernel.org/stable/c/accc0004c501a9918313142282b094d408af06fb
- https://git.kernel.org/stable/c/ef5581bb30efb939cc2bf093475c6cc85258e5cd