SB20260424215 - Use-after-free in Linux kernel bluetooth driver
Published: April 24, 2026
Security Bulletin ID
SB20260424215
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-2026-31500)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 btintel_hw_error() when handling a hardware error concurrently with device close operations. A local user can trigger a race condition to cause a denial of service.
The issue occurs because synchronous HCI command paths manipulate shared request state concurrently.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/5f84e845648dfa86e42de5487f1a774b42f0444d
- https://git.kernel.org/stable/c/66696648af477dc87859e5e4b607112f5f29d010
- https://git.kernel.org/stable/c/94d8e6fe5d0818e9300e514e095a200bd5ff93ae
- https://git.kernel.org/stable/c/e10a4cb72468686ffbe8bb2b0520e37f6be1a0c5
- https://git.kernel.org/stable/c/f7d84737663ad4a120d2d8ef1561a4df91282c2e