CVE-2026-99012
kernel: Bluetooth: ISO: Serialize concurrent connect calls
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Bluetooth subsystem. A local attacker can cause a Denial of Service (DoS) by issuing concurrent connection requests on Bluetooth isochronous (ISO) sockets. Due to improper locking and lack of serialization during connection establishment, simultaneous connect calls can race against each other and trigger a use-after-free memory error, leading to a system crash.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition