SB2026090608 - Use-after-free in Linux kernel bluetooth

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026090608

SB2026090608 - Use-after-free in Linux kernel bluetooth

Published: September 6, 2026

Security Bulletin ID SB2026090608
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-80764)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a use-after-free condition.

The vulnerability exists due to use-after-free in the Bluetooth HCI event handler's LE accept and resolving list handling when a debugfs reader accesses a list entry concurrently with reset completion. A local user can read Bluetooth LE lists through debugfs while reset completion frees a current list entry to trigger a use-after-free condition.

Exploitation requires a concurrent reset completion and read access to the relevant debugfs entries.


Remediation

Install update from vendor's website.

References