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    CVE-2021-3638

    An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

    Published:Jul 7, 2021
    Last Modified:Nov 21, 2024
    EPS:Mar 3, 2022
    EPSS Score:0.0001
    CVSS Score:6.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Qemu
    Product
    Qemu

    Exploits

    https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.htmlhttps://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://bugzilla.redhat.com/show_bug.cgi?id=1979858
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
    https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html
    https://security.netapp.com/advisory/ntap-20220407-0003/
    https://ubuntu.com/security/CVE-2021-3638
    https://bugzilla.redhat.com/show_bug.cgi?id=1979858
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
    https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html
    https://security.netapp.com/advisory/ntap-20220407-0003/
    https://ubuntu.com/security/CVE-2021-3638

    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