SB20260816199 - Use-after-free in Linux kernel bluetooth

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Main Vulnerability Database SB20260816199

SB20260816199 - Use-after-free in Linux kernel bluetooth

Published: August 16, 2026

Security Bulletin ID SB20260816199
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-74510)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to use-after-free in the Bluetooth management subsystem pair command handling in net/bluetooth/mgmt.c when racing pairing completion or authentication failure callbacks with a cancel pair device request. A local user can trigger concurrent pair and cancel operations to cause a denial of service or execute arbitrary code.

The issue arises from unsafe access to shared pending pairing commands on the hdev->mgmt_pending list during command cancellation and callback processing, and the race can also lead to a second list removal.


Remediation

Install update from vendor's website.

References