SB20261023143 - Use-after-free in Linux kernel bluetooth
Published: October 23, 2026
Security Bulletin ID
SB20261023143
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-99014)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.
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