UBUNTU-CVE-2021-3929

    Dashboard / Vulnerabilities / UBUNTU-CVE-2021-3929

    UBUNTU-CVE-2021-3929

    Published: 24 Dec 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-3929
    Aliases:
    USN-5489-1

    Summary:

    Details: A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.

    References: https://ubuntu.com/security/CVE-2021-3929, https://ubuntu.com/security/notices/USN-5489-1, https://www.cve.org/CVERecord?id=CVE-2021-3929

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu6.2?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:6.2+dfsg-2ubuntu6.2

    Affected versions

    1:6.0+dfsg-2expubuntu1

    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
    UBUNTU-CVE-2021-3929 | CVE-DB