CVE-2021-4207

2022-04-2916:07:33

CWE-362

redhat

www.cve.org

qxl display device

qemu

heap-based buffer overflow

AI Score

8.4

Confidence

High

EPSS

0.001

Percentile

39.9%

JSON

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.

CNA Affected

[
  {
    "product": "QEMU",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "qemu-kvm 7.0.0"
      }
    ]
  }
]