---
id: CVE-2023-33952
title: 'Kernel: vmwgfx: double free within the handling of vmw_buffer_object objects'
summary: >-
  A double-free vulnerability was found in handling vmw_buffer_object objects in
  the vmwgfx driver in the Linux kernel. This issue occurs due to the lack of
  validating the existence of an object prior to performing further free
  operations …
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-415
vendor: Red Hat
product: kernel-rt
affected:
  - kernel-rt (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel-rt (all versions)
  - kernel
  - kernel
  - kernel-rt
  - kernel-rt (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2024-05-10T04:00:08.235929Z'
published: '2023-07-24'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T20:24:51.099Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-33952'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:6583'
    label: 'RHSA-2023:6583'
  - url: 'https://access.redhat.com/errata/RHSA-2023:6901'
    label: 'RHSA-2023:6901'
  - url: 'https://access.redhat.com/errata/RHSA-2023:7077'
    label: 'RHSA-2023:7077'
  - url: 'https://access.redhat.com/errata/RHSA-2024:1404'
    label: 'RHSA-2024:1404'
  - url: 'https://access.redhat.com/errata/RHSA-2024:4823'
    label: 'RHSA-2024:4823'
  - url: 'https://access.redhat.com/errata/RHSA-2024:4831'
    label: 'RHSA-2024:4831'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-33952'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2218212'
    label: RHBZ#2218212
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-CAN-20292'
tags:
  - cve.org
epss: 0.00465
epssPercentile: 0.40506
zeroDay: true
ingestedAt: '2026-11-06T21:04:04.250Z'
---

## Overview

A double-free vulnerability was found in handling vmw_buffer_object objects in the vmwgfx driver in the Linux kernel. This issue occurs due to the lack of validating the existence of an object prior to performing further free operations on the object, which may allow a local privileged user to escalate privileges and execute code in the context of the kernel.

## Affected

- `kernel-rt (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel-rt (all versions)`
- `kernel`
- `kernel`
- `kernel-rt`
- `kernel-rt (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

This flaw can be mitigated by preventing the affected `vmwgfx` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.