CVE-2021-20255
Published: 09 March 2021
Summary
CVE-2021-20255 is a medium-severity Infinite Loop (CWE-835) vulnerability in Qemu Qemu. Its CVSS base score is 5.5 (Medium).
Operationally, ranked at the 45.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-7693
Vulnerability details
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…
more
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Enables transfer to alternate site if an infinite loop at the primary renders processing unavailable.
Prevents uncontrolled recursion that exhausts stack or CPU resources.