vulnerability
Ubuntu: (CVE-2021-20255): qemu vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:N/I:N/A:P) | Mar 9, 2021 | Jun 26, 2025 | Aug 18, 2025 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
Mar 9, 2021
Added
Jun 26, 2025
Modified
Aug 18, 2025
Description
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.
Solution
no-fix-ubuntu-package
References
- CVE-2021-20255
- https://attackerkb.com/topics/CVE-2021-20255
- CWE-674
- CWE-835
- URL-https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg06098.html
- URL-https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1
- URL-https://www.cve.org/CVERecord?id=CVE-2021-20255
- URL-https://www.openwall.com/lists/oss-security/2021/02/25/1
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.