CVE-2021-20255

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    CVE-2021-20255

    Published: 9 Mar 2021Last Modified: 9 Jul 2026

    Summary:

    Details: A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

    References: https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html, https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1, https://security.netapp.com/advisory/ntap-20210507-0003/, https://bugzilla.redhat.com/show_bug.cgi?id=1930646, https://www.openwall.com/lists/oss-security/2021/02/25/1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c25df57ae8f9fe1c72eee2dab37d76d904ac382e
    Fixed -None

    Affected versions

    9.0

    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-2021-20255 | CVE-DB