CVSS 3.1
5.5 mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2021-20255
Medium (5.5). EPSS 0.4% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-674, CWE-835
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- qemu:qemu
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1930646
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
- https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1
- https://security.netapp.com/advisory/ntap-20210507-0003/
- https://www.openwall.com/lists/oss-security/2021/02/25/1