SB2026050252 - Use-after-free in Linux kernel bluetooth
Published: May 2, 2026
Security Bulletin ID
SB2026050252
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-2026-43018)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to use-after-free in hci_le_remote_conn_param_req_evt when handling Bluetooth LE remote connection parameter request events. A local attacker can trigger concurrent connection handling to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c
- https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20
- https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81
- https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19
- https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09
- https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c