CVE-2021-3735

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    CVE-2021-3735

    Published: 26 Aug 2022Last Modified: 8 Jul 2026

    Summary:

    Details: 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.

    References: https://access.redhat.com/security/cve/CVE-2021-3735, https://security-tracker.debian.org/tracker/CVE-2021-3735, https://security.netapp.com/advisory/ntap-20250228-0009/, https://bugzilla.redhat.com/show_bug.cgi?id=1997184

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ecf2706e271fa705621f0d5ad9517fe15a22bf22
    Fixed -None

    Affected versions

    6.1.0-rc4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-3735 | CVE-DB