CVE-2021-4206

HighCVSS 8.2/10Last modified Jun 17, 2026

Description

A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

Metrics

CVSS 3.1 8.2/10CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-190 CWE-120 CWE-131

Affected software

No affected versions have been published.

Timeline

Published: Apr 29, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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