Boundary Check Missing in vm_access in drm/i915/gem
Summary
GSD-2022-1001282: drm/i915/gem: add missing boundary check in vm_access. Affects Kernel versions >= 9f909e215fea0652023b9ed09d3d7bfe10386423, < 8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa. No fix is published. How to fix ↓
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Background
The drm/i915/gem package is a component of the Linux Kernel that provides support for Intel integrated graphics devices. It includes various features and functionalities related to graphics memory management, including the vm_access function. This function is responsible for handling access to the virtual memory of the graphics device. However, a vulnerability has been identified in the implementation of vm_access, where a missing boundary check can lead to potential security issues.
Vulnerability Detail
The vulnerability in drm/i915/gem arises from a missing boundary check in the vm_access function. This issue allows an attacker to access memory beyond the intended boundaries, potentially leading to information disclosure or privilege escalation. By exploiting this vulnerability, an attacker could gain unauthorized access to sensitive data or execute arbitrary code with elevated privileges. The vulnerability was introduced in version v5.8 of the Linux Kernel and has been fixed in version v5.17.2.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can apply a patch that addresses the missing boundary check in the vm_access function. The patch can be obtained from the official Linux Kernel repository and applied to the affected system. However, it is strongly recommended to update to the latest version of the Kernel to ensure comprehensive vulnerability mitigation.
Conclusion
In conclusion, the vulnerability in drm/i915/gem due to the missing boundary check in the vm_access function can lead to potential security risks, including information disclosure and privilege escalation. It is crucial to update the Linux Kernel to version v5.17.2 or later to mitigate this vulnerability. Applying the provided patch or using Vulert's playground can help assess the impact on your system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows an attacker to access memory beyond the intended boundaries, potentially leading to information disclosure or privilege escalation. This can result in unauthorized access to sensitive data or the execution of arbitrary code with elevated privileges.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert analyzes the manifest file, such as package-lock.json, and provides real-time alerts for open-source vulnerabilities in the software.
Yes, a patch addressing the missing boundary check in the vm_access function is available. However, it is recommended to update to the latest version of the Linux Kernel for comprehensive vulnerability mitigation.
You can refer to the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) for more information about the fix. The commit 8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa in version v5.17.2 addresses this vulnerability.
To update the Linux Kernel, you need to obtain the latest version of the Kernel source code from the official repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compile it according to the provided instructions. Once the updated Kernel is installed, the vulnerability will be mitigated.
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