CVE-2021-0948 : Security Advisory and Response

Android SoC: Uninitialized Kernel Memory Disclosure Vulnerability

Understanding CVE-2021-0948

This CVE record highlights an information disclosure vulnerability in the PowerVR kernel driver affecting Android SoC devices.

What is CVE-2021-0948?

The PVRSRVBridgeGetMultiCoreInfo ioctl in the PowerVR kernel driver can disclose uninitialized kernel memory to user space, potentially exposing sensitive data.

The Impact of CVE-2021-0948

Exploiting this vulnerability could lead to unauthorized access to sensitive information stored in the kernel memory, compromising user privacy and system security.

Technical Details of CVE-2021-0948

This section provides an overview of the vulnerability, affected systems, and exploitation mechanism.

Vulnerability Description

The PVRSRVBridgeGetMultiCoreInfo ioctl can retrieve uninitialized kernel memory contents, presenting a risk of leaking sensitive data to unauthorized users.

Affected Systems and Versions

Android devices running the PowerVR kernel driver, specifically those utilizing the Android SoC, are impacted by this vulnerability.

Exploitation Mechanism

By sending specially crafted requests to the PVRSRVBridgeGetMultiCoreInfo ioctl, attackers can access uninitialized kernel memory containing valuable information.

Mitigation and Prevention

Learn how to protect your systems and data from the CVE-2021-0948 vulnerability.

Immediate Steps to Take

Monitor security advisories from Google for patch releases addressing this vulnerability.
Implement security updates provided by the vendor to secure affected systems.

Long-Term Security Practices

Regularly update your Android devices to the latest firmware to ensure security patches are applied.
Follow secure coding practices to mitigate the risk of memory disclosure vulnerabilities in custom applications.

Patching and Updates

Refer to Google's security bulletin dated July 1, 2023, for detailed information on the patch addressing CVE-2021-0948.