CVE-2021-0876: PowerVR Kernel Driver Integer Overflow Vulnerability
Summary
CVE-2021-0876: In PVRSRVBridgePhysmemNewRamBackedLockedPMR of the PowerVR kernel driver, a missing size check means there is a possible integer overflow that could allow out-of-bounds heap access. Affects :unknown: versions >= SoCVersion:0, < SoCVersion:2023-04-05. Fixed in SoCVersion:2023-04-05. How to fix ↓
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Background
The PowerVR kernel driver is an essential component of the Android ecosystem, responsible for managing graphics processing and rendering tasks. It enables efficient communication between the operating system and the hardware, ensuring smooth graphics performance. However, this driver has been found to contain a vulnerability that could potentially allow unauthorized access to system resources.
Vulnerability Detail
In the function PVRSRVBridgePhysmemNewRamBackedLockedPMR of the PowerVR kernel driver, a missing size check can lead to an integer overflow. This flaw may result in out-of-bounds heap access, which could be exploited to escalate privileges locally without requiring additional execution privileges. The vulnerability poses a significant risk as it can be exploited without user interaction, making it a critical concern for system security.
How To Fix
Minimum fixed version
SoCVersion:2023-04-05
This is the first release that contains the fix.
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Workaround
Currently, there are no specific workarounds available for this vulnerability. The best course of action is to apply the available patch as soon as possible.
Conclusion
The CVE-2021-0876 vulnerability in the PowerVR kernel driver poses a significant risk due to the potential for local privilege escalation. Users are strongly advised to update to the patched version released on April 5, 2023, to protect their systems from exploitation. Regular monitoring and timely updates are essential for maintaining system security.
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FAQ
CVE-2021-0876 is a vulnerability in the PowerVR kernel driver that can lead to local privilege escalation due to an integer overflow.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
No, user interaction is not needed for exploitation, making this vulnerability particularly concerning.
While there are no specific workarounds, it is crucial to prioritize updating your driver to the patched version as soon as possible to mitigate risks.
Exploitation of this vulnerability could lead to unauthorized access to system resources, allowing attackers to escalate privileges and potentially compromise the system.
References
Related vulnerabilities
Recent vulnerabilities recorded for :unknown:.
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