---
title: "CVE-2026-80958: Linux kernel dm-pcache - Out of Bounds Read"
description: "Linux kernel dm-pcache contains a buffer over-read caused by improper bounds checking in tail kset read in cache_replay(), letting attackers potentially read beyond segment data, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-80958/
---

# CVE-2026-80958 Linux kernel dm-pcache - Out of Bounds Read

Linux kernel dm-pcache contains a buffer over-read caused by improper bounds checking in tail kset read in cache\_replay(), letting attackers potentially read beyond segment data, exploit requires local access.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80958)

## Details

Type

Out of Bounds Read

Impact

Information Disclosure

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix.

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-2026-80958](https://nvd.nist.gov/vuln/detail/CVE-2026-80958)
- [https://git.kernel.org/stable/c/1ab55354368d071ebaee4d8c82313955eab65a04](https://git.kernel.org/stable/c/1ab55354368d071ebaee4d8c82313955eab65a04)
- [https://git.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c](https://git.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c)
- [https://git.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68](https://git.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68)

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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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