VULNERABILITY INTELLIGENCE

CVE-2021-20181

CVSS score7.5 HIGH
EPSS probability0.33%
CISA KEVNot currently listed
Published2021-05-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Description

A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.

Weakness classification

  • secalert@redhat.com: CWE-367
  • nvd@nist.gov: CWE-362

Primary references