---
id: CVE-2026-80962
title: >-
  kernel: dm-pcache: validate geometry fields from on-disk cache_info
  (CVE-2026-80962)
summary: >-
  A flaw was found in the Linux kernel's dm-pcache component. A local attacker
  with administrative privileges (CAP_SYS_ADMIN) could manipulate on-disk cache
  metadata to provide invalid geometry fields. This manipulation could lead to
  an out-…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:36:34+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80962.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80962.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80962'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532323'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80962'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80962'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80962.mbox
  - url: 'https://git.kernel.org/stable/c/32d1809da31094ef76fd98dc1f1a8b55ca1295dd'
  - url: 'https://git.kernel.org/stable/c/3e19172089ec81132a8a48e802b1034a744209f4'
  - url: 'https://git.kernel.org/stable/c/ab5dcde6fa96bc115b85f3621c60e39c66229a90'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00161
epssPercentile: 0.05756
scores:
  vendor: 6
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel's dm-pcache component. A local attacker with administrative privileges (CAP_SYS_ADMIN) could manipulate on-disk cache metadata to provide invalid geometry fields. This manipulation could lead to an out-of-bounds read and write, potentially causing memory corruption and impacting system stability.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80962.json)

**kernel: dm-pcache: validate geometry fields from on-disk cache_info** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.