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CVE-2021-3735

Date: August 26, 2022

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.

Language: C

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2021-3735
https://bugzilla.redhat.com/show_bug.cgi?id=1997184
https://security-tracker.debian.org/tracker/CVE-2021-3735
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3735
https://security.netapp.com/advisory/ntap-20250228-0009/
https://access.redhat.com/security/cve/CVE-2021-3735
https://www.mend.io/vulnerability-database/CVE-2021-3735

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption

CWE-400

Improper Locking

CWE-667

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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