SB2026090606 - Use-after-free in Linux kernel bluetooth
Published: September 6, 2026
Security Bulletin ID
SB2026090606
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-2026-80762)
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 cause a denial of service.
The vulnerability exists due to use-after-free in the Bluetooth hci_update_event_filter_sync() accept-list handling when suspending a Bluetooth controller while an accept-list device is concurrently removed. A local user can trigger concurrent accept-list removal during a controller wait to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/29c59212a507804d7616b8abf491d30b4ab8e75f
- https://git.kernel.org/stable/c/87ad116ac3abc6f2ce2b5b6c488f633003581eee
- https://git.kernel.org/stable/c/95bb57bc11a91caf042ad00fca85e480d3fda37f
- https://git.kernel.org/stable/c/b5181516a9f5c2fdb3271cdad72a5b16c6963a44
- https://git.kernel.org/stable/c/bb5f5414d1a6272a16f68684e998f4063dd19f57
- https://git.kernel.org/stable/c/f57b399c4fa1501b2d5451f52d861ece86bcf3db
- https://git.kernel.org/stable/c/fe93a697a7a92fa9adf78c9ff67a10db3193290c