CVE-2021-39649 : Exploit Details and Defense Strategies
Gain insights into CVE-2021-39649 affecting Android kernel. Learn about the impact, technical details, and mitigation steps for this privilege escalation vulnerability.
This CVE-2021-39649 article provides detailed information on a vulnerability impacting Android systems.
Understanding CVE-2021-39649
This section delves into the specifics of the CVE-2021-39649 vulnerability.
What is CVE-2021-39649?
CVE-2021-39649 is a vulnerability found in Android's regmap_exit function, leading to a possible use-after-free scenario due to improper locking. This flaw could result in a local escalation of privilege within the kernel, requiring System execution privileges without the need for user interaction.
The Impact of CVE-2021-39649
The impact of CVE-2021-39649 could allow an attacker to elevate privileges locally within the Android kernel, potentially leading to further exploitation.
Technical Details of CVE-2021-39649
Exploring the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability stems from a use-after-free issue in the regmap_exit function of regmap.c in Android, attributed to improper locking.
Affected Systems and Versions
- Product: Android
- Versions affected: Android kernel
Exploitation Mechanism
The exploitation of CVE-2021-39649 does not require user interaction and is reliant on the mishandling of locking in the regmap_exit function.
Mitigation and Prevention
Measures to mitigate the impact of CVE-2021-39649.
Immediate Steps to Take
- Apply vendor patches promptly.
- Monitor security bulletins for relevant updates.
Long-Term Security Practices
- Regularly update systems to the latest versions.
- Employ security best practices in kernel development.
Patching and Updates
Stay informed about security advisories and apply patches as soon as they are available.