---
title: "CVE-2026-80995: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in the MCTP network component caused by improper reference handling of route device in mctp_route_lookup(), letting unprivileged local AF_MCTP users cause memory corruption, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-80995/
---

# CVE-2026-80995 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in the MCTP network component caused by improper reference handling of route device in mctp\_route\_lookup(), letting unprivileged local AF\_MCTP users cause memory corruption, exploit requires local access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80995)

## Details

Type

Use After Free

Impact

Denial Of Service, Privilege Escalation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for CVE-2023-3439.

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-2026-80995](https://nvd.nist.gov/vuln/detail/CVE-2026-80995)
- [https://git.kernel.org/stable/c/408da1df18116c971c3392e21e50586688cd3fbf](https://git.kernel.org/stable/c/408da1df18116c971c3392e21e50586688cd3fbf)
- [https://git.kernel.org/stable/c/cc561f8af25586300c2f9d285babb163b866b293](https://git.kernel.org/stable/c/cc561f8af25586300c2f9d285babb163b866b293)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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