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    Dashboard / CVE / CVE-2021-22945

    CVE-2021-22945

    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*.

    Published:Sep 15, 2021
    Last Modified:Jun 9, 2025
    EPS:Sep 23, 2021
    EPSS Score:0.00354
    CVSS Score:9.1

    Affected Products

    Vendor
    Apple
    Product
    Macos
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Haxx
    Product
    Libcurl
    Vendor
    Netapp
    Product
    Cloud Backup
    Vendor
    Netapp
    Product
    Clustered Data Ontap
    Vendor
    Netapp
    Product
    H300e
    Vendor
    Netapp
    Product
    H300e Firmware
    Vendor
    Netapp
    Product
    H300s
    Vendor
    Netapp
    Product
    H300s Firmware
    Vendor
    Netapp
    Product
    H410s
    Vendor
    Netapp
    Product
    H410s Firmware
    Vendor
    Netapp
    Product
    H500e
    Vendor
    Netapp
    Product
    H500e Firmware
    Vendor
    Netapp
    Product
    H500s
    Vendor
    Netapp
    Product
    H500s Firmware
    Vendor
    Netapp
    Product
    H700e
    Vendor
    Netapp
    Product
    H700e Firmware
    Vendor
    Netapp
    Product
    H700s
    Vendor
    Netapp
    Product
    H700s Firmware
    Vendor
    Netapp
    Product
    Solidfire Baseboard Management Controller
    Vendor
    Netapp
    Product
    Solidfire Baseboard Management Controller Firmware
    Vendor
    Oracle
    Product
    Mysql Server
    Vendor
    Siemens
    Product
    Sinec Ins
    Vendor
    Splunk
    Product
    Universal Forwarder

    Exploits

    https://hackerone.com/reports/1269242https://hackerone.com/reports/1269242

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-87546 (CVSS 4.3) — Incorrect type conversion or cast in Safebrowsing in Google Chrome on on Mac prior to 153.0.8010.36 allowed a …
    CVE-2026-87470 (CVSS 9.6) — Improper quantity validation in Tint in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attack…
    CVE-2026-87637 (CVSS 9.6) — Use after free in Extensions in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attacker to ex…
    CVE-2026-87535 (CVSS 6.5) — Information loss or omission in Safebrowsing in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remot…
    CVE-2026-87452 (CVSS 3.1) — Incorrect authorization in GPU in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attacker who…
    CVE-2026-87562 (CVSS 4.3) — Incorrect reference resolution in Accessibility in Google Chrome on on Mac prior to 153.0.8010.36 allowed a re…
    CVE-2026-87558 (CVSS 9.6) — Use after free in Payments in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attacker to exec…
    CVE-2026-87607 (CVSS 9.6) — Use after free in Device in Google Chrome on on Mac prior to 153.0.8010.36 allowed a remote attacker to potent…
    CVE-2026-81984 (CVSS 5.5) — Acrobat Reader is affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory…
    CVE-2026-81989 (CVSS 7.8) — Acrobat Reader is affected by a Use After Free vulnerability that could result in arbitrary code execution in …

    References

    http://seclists.org/fulldisclosure/2022/Mar/29
    https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
    https://hackerone.com/reports/1269242
    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://www.oracle.com/security-alerts/cpuoct2021.html
    http://seclists.org/fulldisclosure/2022/Mar/29
    https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
    https://hackerone.com/reports/1269242
    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://www.oracle.com/security-alerts/cpuoct2021.html

    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