AUGUST 4, 2026
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Case File

CVE-2021-3735

MEDIUM · CVSS 4.4 EPSS 0.20%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-08-26 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-3735
Severity
MEDIUM
CVSS
4.4
EPSS
0.20%

Original NVD Description

A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.