CVE-2021-4206

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    CVE-2021-4206

    Published: 29 Apr 2022Last Modified: 8 Jul 2026

    Summary:

    Details: A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

    References: https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html, https://security.gentoo.org/glsa/202208-27, https://security.netapp.com/advisory/ntap-20250321-0010/, https://www.debian.org/security/2022/dsa-5133, https://bugzilla.redhat.com/show_bug.cgi?id=2036998, https://starlabs.sg/advisories/21-4206/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -823a3f11fb8f04c3c3cc0f95f968fef1bfc6534f

    Affected versions

    v7.0.0-rc4
    v7.0.0-rc3
    v7.0.0-rc2
    v7.0.0-rc1
    v7.0.0-rc0

    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-2021-4206 | CVE-DB