Improper locking in Linux kernel - CVE-2026-46031
Published: May 28, 2026
Vulnerability identifier: #VU132454
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-2026-46031
CWE-ID: CWE-667
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 lock handling in ks8851_irq() when processing interrupts while transmit softirq processing is triggered during critical sections. A local user can trigger network activity that causes the driver to re-enter the transmit path and deadlock the kernel.
The issue occurs in the ks8851 driver and results in a deadlock involving ks8851_start_xmit_par() while the driver lock is already held.
How to mitigate CVE-2026-46031
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/21f1707a8e978558dcb11b053855521e32ac0eec
- https://git.kernel.org/stable/c/518040324067d8efaa2da1992297b7e7bf5640f4
- https://git.kernel.org/stable/c/5c9fcac3c872224316714d0d8914d9af16c76a6d
- https://git.kernel.org/stable/c/640a7631d31db87d5fa1b34cea44a99b6e78854b
- https://git.kernel.org/stable/c/be8aad558b4675f45b43080f81a9ffdeddea73a5