DEBIAN-CVE-2021-20181

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2021-20181
Published: 13 May 2021, 16:15
Last modified:28 Apr 2026, 20:21

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 May 2021, 16:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:21
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Systems

  • debian•qemu

    < 1:5.2+dfsg-4 | < 1:5.2+dfsg-4 | < 1:5.2+dfsg-4 | < 1:5.2+dfsg-4

References (1)