VULNERABILITY INTELLIGENCE

CVE-2021-4207

CVSS score8.2 HIGH
EPSS probability0.40%
CISA KEVNot currently listed
Published2022-04-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Description

A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

Weakness classification

  • secalert@redhat.com: CWE-362
  • nvd@nist.gov: CWE-120

Primary references