CVE-2021-1891 Explained : Impact and Mitigation

A use-after-free vulnerability in the audio driver of various Qualcomm Snapdragon products could lead to a potential security risk.

Understanding CVE-2021-1891

This CVE pertains to a possible use-after-free occurrence in the audio driver of Snapdragon Auto, Compute, Connectivity, Consumer IOT, Industrial IOT, Mobile, Voice & Music, Wearables, Wired Infrastructure, and Networking.

What is CVE-2021-1891?

The vulnerability arises when pointers are mishandled in the aforementioned Qualcomm Snapdragon product range, potentially resulting in a use-after-free vulnerability in the audio driver.

The Impact of CVE-2021-1891

The CVSS score for this vulnerability is 8.4 (High), indicating a significant impact on confidentiality, integrity, and availability. The attack complexity is low, with no required privileges and user interaction.

Technical Details of CVE-2021-1891

This section details the specifics of the vulnerability.

Vulnerability Description

The flaw could be exploited to trigger a use-after-free condition in the audio driver of affected Snapdragon products.

Affected Systems and Versions

Qualcomm Snapdragon products including APQ8009W, APQ8017, AR8031, IPQ8074, MSM8917, PM8004, PM855, QCS402, and many more versions are affected.

Exploitation Mechanism

The vulnerability allows for a potential use-after-free scenario through mishandling of pointers in the audio driver.

Mitigation and Prevention

Protecting systems from CVE-2021-1891 is crucial for maintaining security.

Immediate Steps to Take

Ensure systems running affected Qualcomm Snapdragon products are updated with the latest security patches and fixes.

Long-Term Security Practices

Implement robust security measures, conduct regular security audits, and stay informed about security advisories from Qualcomm.

Patching and Updates

Regularly check for security updates from Qualcomm and apply them promptly to mitigate the risks associated with CVE-2021-1891.