CVE-2021-20255: Debian Linux
Medium severity, CVSS 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.
Affected products
Published 2021-03-09. Last modified 2026-06-17.