DEBIAN-CVE-2021-4145

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    DEBIAN-CVE-2021-4145

    Published: 25 Jan 2022Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-4145

    Summary:

    Details: A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

    References: https://security-tracker.debian.org/tracker/CVE-2021-4145

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/debian/qemu?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:6.2+dfsg-1

    Affected versions

    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
    DEBIAN-CVE-2021-4145 | CVE-DB