Improper control of a resource through its lifetime in Linux kernel - CVE-2026-43409
Published: May 8, 2026
Vulnerability identifier: #VU130776
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-2026-43409
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 management in kprobes module callback handling when removing modules after ftrace has been disabled by errors. A local user can remove a module containing kprobe probes to cause a denial of service.
The issue is triggered after ftrace has been killed due to an error condition.
How to mitigate CVE-2026-43409
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/8b6767e4141b2a42745b544d4555cf1614ba1a2d
- https://git.kernel.org/stable/c/9edc79d664832a842012ad105b1521c1a3c35ab3
- https://git.kernel.org/stable/c/b0ca81616a010807e91fc31db9be242b96326adc
- https://git.kernel.org/stable/c/cae928e3178c75602c21d67e21255d73e7e9ed4f
- https://git.kernel.org/stable/c/e113f0b46d19626ec15388bcb91432c9a4fd6261