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    CVE-2021-3735

    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.

    Published:Aug 24, 2021
    Last Modified:Feb 28, 2025
    EPS:Aug 26, 2022
    EPSS Score:0.00124
    CVSS Score:4.4

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Qemu
    Product
    Qemu

    Exploits

    No exploit reference

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    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