Use-after-free in Linux kernel - CVE-2026-23387
Published: March 26, 2026
Vulnerability identifier: #VU124622
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-2026-23387
CWE-ID: CWE-416
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 perform a denial of service attack.
The vulnerability exists due to a use-after-free error within the cs42l43_pin_probe() function in drivers/pinctrl/cirrus/pinctrl-cs42l43.c. A local user can trigger a double-put use-after-free error and crash the OS kernel.
How to mitigate CVE-2026-23387
Install updates from vendor's website.
Sources
- https://git.kernel.org/stable/c/188ba3468cb7c098c62609d82e9fc58d29ead7f4
- https://git.kernel.org/stable/c/1e0465139fd9caee7ffefe285ef7d5f21919e474
- https://git.kernel.org/stable/c/95b14ecc56881dd9a187e1e84dd0daa88ff22c5d
- https://git.kernel.org/stable/c/ea07fcfbba4301839db3784f09955d9fa3e98090
- https://git.kernel.org/stable/c/fd5bed798f45eb3a178ad527b43ab92705faaf8a