Use-after-free in Linux kernel - CVE-2026-99014
Published: October 23, 2026
Vulnerability identifier: #VU157485
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99014
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to potentially cause a denial of service through a kernel crash.
The vulnerability exists due to use-after-free in the Linux kernel Bluetooth HCI command handling code when setting up periodic advertising synchronization scans. A local user can potentially exercise a race between scan setup and command processing to cause a kernel crash by accessing command buffers after they have been freed.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99014
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2
External References
- https://git.kernel.org/stable/c/119ba8070b3f112dd36c897f4f70ea5bb7d370b8
- https://git.kernel.org/stable/c/762850c203fab1190ad6a3de41cd51920b22236d
- https://git.kernel.org/stable/c/7db33b36213a3a1a40940c009ddac30670b55922
- https://git.kernel.org/stable/c/9af12272061d206af8bc3e40215cb694421ab73a
- https://git.kernel.org/stable/c/f01cbddfb4273fcc9a786d13b0a2525029023605