SB20260816175 - Use-after-free in Linux kernel bluetooth
Published: August 16, 2026
Security Bulletin ID
SB20260816175
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-2026-74541)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the Bluetooth ISO socket handling code when disconnecting an ISO connection and later releasing the socket. A local user can trigger connection teardown that leaves a stale iso_data pointer to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/63c0f396a18b767eb28e895eb95bbdce6c172c59
- https://git.kernel.org/stable/c/69a4a7b162b3db6ac337e3094cdee38f24d42ff7
- https://git.kernel.org/stable/c/7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0
- https://git.kernel.org/stable/c/cc1d39946d62bc568551dfb81149724de1e91338
- https://git.kernel.org/stable/c/d57e506f6a1e3929611340fae87c1e4823f4d85c