SB20260812134 - Use-after-free in Linux kernel bluetooth
Published: August 12, 2026
Security Bulletin ID
SB20260812134
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-2026-68392)
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 use-after-free in the Bluetooth management subsystem net/bluetooth/mgmt.c when handling unpair and disconnect operations. A local user can trigger these operations to cause a denial of service.
The issue arises from dereferencing RCU-protected connection pointers outside the required critical section.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/16cd66443957e4ad42155c6fec401012f600c6f8
- https://git.kernel.org/stable/c/579faba5ede6df6b7f36777c431dc8dcf9d272e7
- https://git.kernel.org/stable/c/8bc83f9ef6789571f399ff631a2a14a12b6d8585
- https://git.kernel.org/stable/c/b11511006f9e17000de3f4cadee451364f658ca3
- https://git.kernel.org/stable/c/ca58ad287bfc5b9d31a72ecb8650289df2b57250