Improper locking in Linux kernel - CVE-2026-45849
Published: May 28, 2026
Vulnerability identifier: #VU132641
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-2026-45849
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 locking in ocelot_port_xmit_inj() when transmitting frames through the register injection path. A local user can trigger the vulnerable code path to cause a denial of service.
The FDMA path is not affected because it uses a different locking mechanism.
How to mitigate CVE-2026-45849
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/026f6513c5880c2c89e38ad66bbec2868f978605
- https://git.kernel.org/stable/c/0b217a40156f497e09dd20d3f7baec40c785f386
- https://git.kernel.org/stable/c/51c32ae7fae14552d79f7139614b77c1bbd57a48
- https://git.kernel.org/stable/c/63da961381e0d979459dede713001f8452364477
- https://git.kernel.org/stable/c/7ac58d8832802ec89baa7539e13e6d58a88cce04
- https://git.kernel.org/stable/c/cc1b179f778f98270bdbbb48d183b4b6427ae198