VDB
CVE-2021-20255
CVE-2021-20255
PUBLISHED
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
EPSS 0.23% · 45.7th percentile
Risk Scores
EPSS Score
0.23%
45.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | qemu | *, *, * |
| Ubuntu:Pro:16.04:LTS | qemu | 1:2.5+dfsg-5ubuntu10.32, 1:2.5+dfsg-5ubuntu10.34, * |
| Ubuntu:25.10 | qemu | 0, *, * |
| Ubuntu:24.04:LTS | qemu | *, 0, 1:8.0.4+dfsg-1ubuntu4 |
| Ubuntu:22.04:LTS | qemu | 1:6.0+dfsg-2expubuntu2, 1:6.0+dfsg-2expubuntu4, 1:6.2+dfsg-2ubuntu5 |
| Ubuntu:Pro:14.04:LTS | qemu | 2.0.0+dfsg-2ubuntu1.6, 2.0.0+dfsg-2ubuntu1.7, 2.0.0+dfsg-2ubuntu1.8 |
| Ubuntu:Pro:18.04:LTS | qemu | *, 0, 1:2.10+dfsg-0ubuntu3 |
Timeline
- Mar 9, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20255 third-party-advisory
- https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg06098.html third-party-advisory
- https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/02/25/1 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20255 third-party-advisory