CVE-2026-90092 Linux Kernel Bluetooth L2CAP - Use After Free

Linux kernel Bluetooth L2CAP contains a use-after-free caused by race conditions and improper socket state handling in l2cap_sock_new_connection_cb and l2cap_sock_teardown_cb, letting attackers cause memory corruption, exploit requires concurrent connection attempts.

CVSS base score 8.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for this issue.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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