---
title: "CVE-2026-80955: Linux Kernel dm-pcache - Use After Free"
description: "Linux kernel dm-pcache contains a use-after-free vulnerability caused by accessing freed key memory in kset_replay(), letting attackers cause memory corruption or denial of service, exploit requires triggering stale key conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-80955/
---

# CVE-2026-80955 Linux Kernel dm-pcache - Use After Free

Linux kernel dm-pcache contains a use-after-free vulnerability caused by accessing freed key memory in kset\_replay(), letting attackers cause memory corruption or denial of service, exploit requires triggering stale key conditions.

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-2026-80955)

## Details

Type

Use After Free

Impact

Denial Of Service

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 dm-pcache use-after-free.

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-2026-80955](https://nvd.nist.gov/vuln/detail/CVE-2026-80955)
- [https://git.kernel.org/stable/c/1894fc7a3bab90143dcd26ef8ee27040ef4a7501](https://git.kernel.org/stable/c/1894fc7a3bab90143dcd26ef8ee27040ef4a7501)
- [https://git.kernel.org/stable/c/c2e894eac398b258f12fdec73ed6ba081047f7b3](https://git.kernel.org/stable/c/c2e894eac398b258f12fdec73ed6ba081047f7b3)
- [https://git.kernel.org/stable/c/f39a3e9cc5946473e16d6f5071b2ee0216c56d06](https://git.kernel.org/stable/c/f39a3e9cc5946473e16d6f5071b2ee0216c56d06)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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.

[Book a demo](https://panop.io/demo)