CVE-2026-90091
kernel: Bluetooth: L2CAP: fix race l2cap_sock_cleanup_listen() vs. put_chan
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Bluetooth L2CAP (Logical Link Control and Adaptation Protocol) component. A race condition, a situation where multiple operations occur at the same time and interfere with each other, exists between internal functions. This can lead to a null pointer dereference, which may cause the system to crash or become unstable, resulting in a denial of service.
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-476 · NULL Pointer Dereference