#VU119305 Use-after-free in Linux kernel - CVE-2025-40309
Published: December 8, 2025
Vulnerability identifier: #VU119305
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-40309
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the sco_sock_kill() function in net/bluetooth/sco.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/03371c0218189b185595b65a04dad60076ca9718
- https://git.kernel.org/stable/c/391f83547b7b2c63e4b572ab838e10a06cfa4425
- https://git.kernel.org/stable/c/57707135755bd78b1fe5acaebb054fba4739e14c
- https://git.kernel.org/stable/c/c17caff1062ca91ebac44bfd01d2fb3d99dc0e23
- https://git.kernel.org/stable/c/c419674cc74309ffaabc591e7200efb49a18fccd
- https://git.kernel.org/stable/c/d2850f037c2ae75882d68ae654d546ff5c0f678c
- https://git.kernel.org/stable/c/ecb9a843be4d6fd710d7026e359f21015a062572
- https://git.kernel.org/stable/c/ed10dddc7df2daaf2a4d98a972aac5183e738cc0