CVE-2021-3416

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    CVE-2021-3416

    Published: 18 Mar 2021Last Modified: 8 Jul 2026

    Summary:

    Details: A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

    References: https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html, https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html, https://security.gentoo.org/glsa/202208-27, https://security.netapp.com/advisory/ntap-20210507-0002/, https://bugzilla.redhat.com/show_bug.cgi?id=1932827, https://www.openwall.com/lists/oss-security/2021/02/26/1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v5.2.0
    v5.2.0-rc4
    v5.2.0-rc3
    v5.2.0-rc2
    v5.2.0-rc1
    v5.2.0-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-2021-3416 | CVE-DB