Improper control of a resource through its lifetime in Linux kernel - CVE-2026-45957
Published: May 28, 2026
Vulnerability identifier: #VU132530
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-2026-45957
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 rcu_read_unlock_special() when handling softirq processing during rcu_read_unlock(). A local user can trigger the affected kernel path to cause a denial of service.
Exploitation requires ftrace to be enabled.
How to mitigate CVE-2026-45957
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1f16679a5aa60238466ce339c35f5e82ece60337
- https://git.kernel.org/stable/c/4a4a6e12c9c829be3f74b7206fa8640fc4e1c566
- https://git.kernel.org/stable/c/979c708e6c9d7fc461daef2dad8b45f22e23464c
- https://git.kernel.org/stable/c/c2932e16d8c354404b17123e64daa8e33191e145
- https://git.kernel.org/stable/c/d41e37f26b3157b3f1d10223863519a943aa239b