VDB
CVE-2021-20181
CVE-2021-20181
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.33% · 26.7th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS Score
0.33%
26.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | qemu | 1:2.11+dfsg-1ubuntu7.22, *, * |
| Ubuntu:20.04:LTS | qemu | 1:4.0+dfsg-0ubuntu10, 1:4.2-3ubuntu5, 1:4.2-3ubuntu4 |
| Ubuntu:16.04:LTS | qemu | 1:2.5+dfsg-5ubuntu10.20, 0, 1:2.3+dfsg-5ubuntu10 |
| Ubuntu:Pro:14.04:LTS | qemu | 2.0.0+dfsg-2ubuntu1.17, 0, 2.0.0+dfsg-2ubuntu1.15 |
Timeline
- Feb 1, 2021 CVE Published
- May 14, 2021 EPSS Score
- Jul 17, 2021 EPSS Score
- Sep 17, 2021 EPSS Score
- Nov 18, 2021 EPSS Score
- Jan 19, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Mar 22, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 23, 2022 EPSS Score
- Jul 25, 2022 EPSS Score
- Sep 25, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20181 third-party-advisory
- https://ubuntu.com/security/notices/USN-4725-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20181 third-party-advisory