PT-2021-7314 · Qemu+3 · Qemu+3

Cornelius Aschermann + 2 · Published 2021-03-09 · Updated 2025-01-28 · CVE-2021-20255

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions QEMU (affected versions not specified)

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. The 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Infinite Loop

Uncontrolled Recursion

Weakness Enumeration

CWE-835

CWE-674

Related Identifiers

AZL-35149

AZL-6829

BDU:2022-05644

CVE-2021-20255

DLA-2623-1

OPENSUSE-SU-2021:1202-1

OPENSUSE-SU-2021:2789-1

OPENSUSE-SU-2021:2858-1

OPENSUSE-SU-2021:3614-1

OPENSUSE-SU-2021_1202-1

OPENSUSE-SU-2021_2789-1

OPENSUSE-SU-2021_2858-1

OPENSUSE-SU-2021_3614-1

ROSA-SA-2025-2641

SUSE-SU-2021:14848-1

SUSE-SU-2021:2789-1

SUSE-SU-2021:2813-1

SUSE-SU-2021:2858-1

SUSE-SU-2021:2924-1

SUSE-SU-2021:2955-1

SUSE-SU-2021:2957-1

SUSE-SU-2021:3322-1

SUSE-SU-2021:3575-1

SUSE-SU-2021:3613-1

SUSE-SU-2021:3614-1

SUSE-SU-2021:3635-1

SUSE-SU-2021_14848-1

Affected Products

Astra Linux

Debian

Qemu

Suse

References · 139

• https://osv.dev/vulnerability/SUSE-SU-2021:2957-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3614-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20255 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20255 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-05644 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2021:2789-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2623-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1202-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2924-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-0819SE17 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3614-1 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-6829 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3575-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2858-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1930646 · Patch