CVE-2021-3573 : Security Advisory and Response
Learn about CVE-2021-3573, a use-after-free vulnerability in the Linux kernel HCI subsystem. Understand its impact, affected versions, and mitigation steps.
A use-after-free vulnerability in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was discovered. This flaw allows a privileged local user to crash the system or escalate their privileges. The affected versions include Linux kernel versions prior to 5.13-rc5.
Understanding CVE-2021-3573
This section will cover the details of the CVE-2021-3573 vulnerability.
What is CVE-2021-3573?
CVE-2021-3573 is a use-after-free vulnerability in the Linux kernel HCI subsystem that could be exploited by a privileged local user.
The Impact of CVE-2021-3573
The impact of this vulnerability could lead to system crashes or privilege escalation for the attacker.
Technical Details of CVE-2021-3573
Explore the technical aspects of CVE-2021-3573 in this section.
Vulnerability Description
The vulnerability arises in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem.
Affected Systems and Versions
The flaw affects Linux kernel versions prior to 5.13-rc5.
Exploitation Mechanism
A privileged local user could exploit the vulnerability by triggering a race condition in certain function calls.
Mitigation and Prevention
Discover how to mitigate and prevent exploitation of CVE-2021-3573 in this section.
Immediate Steps to Take
Take immediate actions to address the vulnerability, such as applying relevant patches.
Long-Term Security Practices
Implement long-term security practices to ensure the continued protection of your systems.
Patching and Updates
Regularly update your systems with the latest kernel patches and security fixes to safeguard against CVE-2021-3573.