CVE-2021-4145

    Dashboard / Vulnerabilities / CVE-2021-4145

    CVE-2021-4145

    Published: 25 Jan 2022Last Modified: 9 Jul 2026

    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.gentoo.org/glsa/202208-27, https://security.netapp.com/advisory/ntap-20220311-0004/, https://bugzilla.redhat.com/show_bug.cgi?id=2034602, https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- f9baca549e44791be0dd98de15add3d8452a8af0
    Fixed -None

    Affected versions

    6.1.0-NA
    6.1.0-rc0
    6.1.0-rc1
    6.1.0-rc2
    6.1.0-rc3
    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-2021-4145 | CVE-DB