CVE-2021-1958 : Security Advisory and Response

A race condition in fastrpc kernel driver for dynamic process creation can lead to use after free scenario in Snapdragon Auto, Snapdragon Connectivity, Snapdragon Mobile, Snapdragon Wearables.

Understanding CVE-2021-1958

This CVE involves a race condition in the fastrpc kernel driver that impacts various Qualcomm Snapdragon products.

What is CVE-2021-1958?

The CVE-2021-1958 vulnerability is related to a race condition in the fastrpc kernel driver that can result in a use after free scenario in Snapdragon Auto, Snapdragon Connectivity, Snapdragon Mobile, Snapdragon Wearables devices.

The Impact of CVE-2021-1958

The impact of this vulnerability is classified as moderate, with a CVSS base score of 6.7. It has a high impact on confidentiality, integrity, and availability, with privileges required for exploitation rated as high.

Technical Details of CVE-2021-1958

This section provides insights into the vulnerability's description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from a race condition in the fastrpc kernel driver, leading to a use after free scenario in Snapdragon Auto, Connectivity, Mobile, and Wearables products.

Affected Systems and Versions

Multiple Qualcomm Snapdragon products are affected, including QCA6574A, QCA6595, SA6155P, SD480, SD888 5G, and more, as listed in the vendor's security bulletin.

Exploitation Mechanism

The vulnerability requires a local attack vector with high privileges. A successful exploit can result in high impact on confidentiality, integrity, and availability of the affected systems.

Mitigation and Prevention

To address CVE-2021-1958, immediate steps should be taken to secure the impacted systems and prevent exploitation. Long-term security practices and timely patching are crucial.

Immediate Steps to Take

Users are advised to apply relevant security patches provided by Qualcomm to mitigate the vulnerability. Additionally, users should monitor for any unusual system activities.

Long-Term Security Practices

Implementing least privilege access, network segmentation, and regular security audits can enhance the overall security posture and reduce the risk of similar vulnerabilities.

Patching and Updates

Regularly check for security bulletins from Qualcomm and apply patches promptly to ensure system protection against known vulnerabilities.