Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-43167
Published: May 7, 2026
Vulnerability identifier: #VU130574
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-2026-43167
CWE-ID: CWE-772
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 resource management in xfrm device event handling when processing NETDEV_UNREGISTER events for xfrm offload state. A local user can create xfrm state associated with a network device and then unregister the device to cause a denial of service.
The issue results in a leaked reference to struct net_device through struct xfrm_state, which can prevent the device from being freed.
How to mitigate CVE-2026-43167
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/166801e49a5b5fc127b8c9e2f110f303cfddfbc3
- https://git.kernel.org/stable/c/4efa91a28576054aae0e6dad9cba8fed8293aef8
- https://git.kernel.org/stable/c/59581778792cbaf8ad788f4a21dc663ce986050e
- https://git.kernel.org/stable/c/8c75c455ecd3bfd2f36abf66edb7021c4fa19ec4
- https://git.kernel.org/stable/c/a3c8fede034fa27892f87c863cbd5493167d17ed