CVE-2021-20181
7.5
HIGH
CVSS 3.1
EPSS 0.07%
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.
How to fix CVE-2021-20181
To remediate CVE-2021-20181, upgrade the affected package to a fixed version below.
- —upgrade to 1:5.2+dfsg-4 or later
Is CVE-2021-20181 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:5.2+dfsg-4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |