---
title: "CVE-2026-90092: Linux Kernel Bluetooth L2CAP - Use After Free"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-90092/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90092)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90092](https://nvd.nist.gov/vuln/detail/CVE-2026-90092)
- [https://git.kernel.org/stable/c/2a3a27aaf19bf069720e024ce6fde54e6bf80df9](https://git.kernel.org/stable/c/2a3a27aaf19bf069720e024ce6fde54e6bf80df9)
- [https://git.kernel.org/stable/c/491e4c60017969b053888029998d2a61f298986a](https://git.kernel.org/stable/c/491e4c60017969b053888029998d2a61f298986a)
- [https://git.kernel.org/stable/c/87276dc15b559d32757a43b4415c8445fbae06c4](https://git.kernel.org/stable/c/87276dc15b559d32757a43b4415c8445fbae06c4)
- [https://git.kernel.org/stable/c/bf61a65c6093970e3b50031c4b79ebf3bd411eba](https://git.kernel.org/stable/c/bf61a65c6093970e3b50031c4b79ebf3bd411eba)
- [https://git.kernel.org/stable/c/c47339e169bf4a0a4cfabb91351471f67744c2bc](https://git.kernel.org/stable/c/c47339e169bf4a0a4cfabb91351471f67744c2bc)
- [https://git.kernel.org/stable/c/d4bfa78fd67929b62b02013c107973e0c5b7aa9a](https://git.kernel.org/stable/c/d4bfa78fd67929b62b02013c107973e0c5b7aa9a)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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