critical
9.8
CWE
416
Advisory Published
Updated

CVE-2021-33574: Use After Free

First published: Tue May 25 2021(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
GNU glibc=2.32
GNU glibc=2.33
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Netapp Cloud Backup
NetApp E-Series SANtricity OS Controller>=11.0<=11.70.1
Netapp Solidfire Baseboard Management Controller Firmware
Netapp H300s Firmware
Netapp H300s
Netapp H500s Firmware
Netapp H500s
Netapp H700s Firmware
Netapp H700s
Netapp H300e Firmware
Netapp H300e
Netapp H500e Firmware
Netapp H500e
Netapp H700e Firmware
Netapp H700e
Netapp H410s Firmware
Netapp H410s
Debian Debian Linux=10.0

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-33574.

  • What is the severity rating of CVE-2021-33574?

    CVE-2021-33574 has a severity rating of 9.8 (Critical).

  • Which software versions are affected by CVE-2021-33574?

    The affected software versions for CVE-2021-33574 are GNU glibc versions 2.32 and 2.33, Fedoraproject Fedora versions 33 and 34, Netapp Cloud Backup, NetApp E-Series SANtricity OS Controller versions between 11.0 and 11.70.1, Netapp Solidfire Baseboard Management Controller Firmware, Apple macOS Ventura, Apple macOS Big Sur, Apple macOS Monterey, Netapp H300e Firmware, Netapp H500e Firmware, Netapp H700e Firmware, Netapp H300e, Netapp H500e, Netapp H700e, and Debian Debian Linux version 10.0.

  • What is the impact of the use-after-free vulnerability in CVE-2021-33574?

    The use-after-free vulnerability in CVE-2021-33574 can lead to a denial of service (application crash) or possible arbitrary code execution.

  • Are there any fixes or patches available for CVE-2021-33574?

    Yes, patches have been released to address the vulnerability in affected software versions. It is recommended to update to the latest patched version provided by the software vendor.

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