---
title: "CVE-2026-90255: Linux kernel Bluetooth - Use After Free"
description: "Linux kernel Bluetooth component contains a use-after-free vulnerability caused by improper handling of SCO setup context lifetime in hci_conn, letting attackers cause memory corruption or denial of service, exploit requires Bluetooth connection manipulation."
url: https://panop.io/threat-heartbeat/CVE-2026-90255/
---

# CVE-2026-90255 Linux kernel Bluetooth - Use After Free

Linux kernel Bluetooth component contains a use-after-free vulnerability caused by improper handling of SCO setup context lifetime in hci\_conn, letting attackers cause memory corruption or denial of service, exploit requires Bluetooth connection manipulation.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90255)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/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 with the fix for SCO setup context lifetime.

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-2026-90255](https://nvd.nist.gov/vuln/detail/CVE-2026-90255)
- [https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2](https://git.kernel.org/stable/c/37cfec41365c826d5496ef5d00c9e215eee53aa2)
- [https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d](https://git.kernel.org/stable/c/42de40abe25db9211107af8896d0fd741f10648d)
- [https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9](https://git.kernel.org/stable/c/4d7b1c834d2775b73c65e4888e01f5af8b477fe9)
- [https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27](https://git.kernel.org/stable/c/9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27)
- [https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae](https://git.kernel.org/stable/c/a661de0ee29d0915c5e924edf91d2be2b4d35bae)
- [https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116](https://git.kernel.org/stable/c/c1fe3c74a89a7749cba3caa0dd91236049c66116)

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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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