SB20261007122 - Use-after-free in Linux kernel bluetooth
Published: October 7, 2026
Security Bulletin ID
SB20261007122
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98246)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger access to freed kernel memory.
The vulnerability exists due to use-after-free in the Bluetooth local codec list handling when device closure and a BT_CODEC query execute concurrently. A local user can issue a BT_CODEC query during device closure to trigger access to freed kernel memory.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1276c2fafd18499769a28f96f45c5a76d6fc990e
- https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c
- https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00
- https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382
- https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e
- https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5