CVE-2021-22945

    Dashboard / Vulnerabilities / CVE-2021-22945

    CVE-2021-22945

    Published: 23 Sept 2021Last Modified: 8 Jul 2026

    Summary:

    Details: When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

    References: http://seclists.org/fulldisclosure/2022/Mar/29, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/, https://security.gentoo.org/glsa/202212-01, https://security.netapp.com/advisory/ntap-20211029-0003/, https://support.apple.com/kb/HT213183, https://www.debian.org/security/2022/dsa-5197, https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf, https://hackerone.com/reports/1269242, https://www.oracle.com/security-alerts/cpuoct2021.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 315ee3fe75dade912b48a21ceec9ccda0230d937
    Fixed -None

    Affected versions

    curl-7_78_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-2021-22945 | CVE-DB