CVE-2021-33574

    Dashboard / Vulnerabilities / CVE-2021-33574

    CVE-2021-33574

    Published: 25 May 2021Last Modified: 28 Aug 2026

    Summary:

    Details: The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJYYIMDDYOHTP2PORLABTOHYQYYREZDD/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBUUWUGXVILQXVWEOU7N42ICHPJNAEUP/, https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html, https://security.gentoo.org/glsa/202107-07, https://security.netapp.com/advisory/ntap-20210629-0005/, https://sourceware.org/bugzilla/show_bug.cgi?id=27896, https://sourceware.org/bugzilla/show_bug.cgi?id=27896#c1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 3de512be7ea6053255afed6154db9ee31d4e557a
    Fixed -None

    Affected versions

    2.32

    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-2021-33574 | CVE-DB