Improper resource shutdown or release in Linux kernel - CVE-2026-31563
Published: April 25, 2026
Vulnerability identifier: #VU127838
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-2026-31563
CWE-ID: CWE-404
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 shutdown or release in the macb TX SKB freeing logic when freeing transmitted socket buffers in an IRQ-disabled context. A local user can trigger network traffic processing to cause a denial of service.
How to mitigate CVE-2026-31563
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/647b8a2fe474474704110db6bd07f7a139e621eb
- https://git.kernel.org/stable/c/78c8b090a3d5c1689dc989861b0163180db2b3f8
- https://git.kernel.org/stable/c/92e7081f0c79d9073087e54bab745bb184192c2e
- https://git.kernel.org/stable/c/984350b37372f79f71d4f0a5264c640e40daf9ce
- https://git.kernel.org/stable/c/ca4d05afb4683d685bb2c6fccae4386c478f524a
- https://git.kernel.org/stable/c/f4bc91398b579730284328322365afa77a9d568f