---
title: "CVE-2026-93201: Linux Kernel dm-pcache - Out-of-Bounds Read & Write"
description: "Linux kernel dm-pcache contains an out-of-bounds read and write vulnerability caused by lack of validation of seg_id fields from persistent memory in cache device metadata, letting attackers with CAP_SYS_ADMIN privileges cause memory corruption, exploit requires CAP_SYS_ADMIN privilege."
url: https://panop.io/threat-heartbeat/CVE-2026-93201/
---

# CVE-2026-93201 Linux Kernel dm-pcache - Out-of-Bounds Read & Write

Linux kernel dm-pcache contains an out-of-bounds read and write vulnerability caused by lack of validation of seg\_id fields from persistent memory in cache device metadata, letting attackers with CAP\_SYS\_ADMIN privileges cause memory corruption, exploit requires CAP\_SYS\_ADMIN privilege.

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-2026-93201)

## Details

Type

Out-of-Bounds Read

Impact

Denial Of Service, Data Tampering

CVSS vector

CVSS:3.1/AV:L/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 patch that validates seg\_id fields and bounds checks cache segments.

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-2026-93201](https://nvd.nist.gov/vuln/detail/CVE-2026-93201)
- [https://git.kernel.org/stable/c/90c990a68460d7b5720e5634cf650eccdf0f4098](https://git.kernel.org/stable/c/90c990a68460d7b5720e5634cf650eccdf0f4098)
- [https://git.kernel.org/stable/c/b4bf8af5e7d7db4c5e179e15017da55857761ac4](https://git.kernel.org/stable/c/b4bf8af5e7d7db4c5e179e15017da55857761ac4)
- [https://git.kernel.org/stable/c/96d4b275281b45aacd0f0510fa8bec85d9f7dc5a](https://git.kernel.org/stable/c/96d4b275281b45aacd0f0510fa8bec85d9f7dc5a)

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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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