CVE-2021-33574: Use After Free
The mqnotify 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.
Affected Software
Event History
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.