Context Use-After-Free Vulnerability in Linux Kernel (CVE-2023-52913)
Summary
CVE-2023-52913: In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fix potential context UAFs gem_context_register() makes the context visible to userspace, and which point a separate thread can trigger the I9... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware management and system resources. It is widely used across various platforms, including servers, desktops, and embedded systems. This vulnerability affects the i915 graphics driver within the kernel, which is responsible for managing Intel graphics hardware. The vulnerability arises from improper handling of context pointers, leading to potential security risks.
Vulnerability Detail
In the Linux kernel, specifically within the i915 graphics driver, a use-after-free (UAF) vulnerability has been identified. This issue occurs when the gem_context_register() function makes a graphics context visible to userspace, allowing a separate thread to invoke the I915_GEM_CONTEXT_DESTROY ioctl. If the context pointer is accessed after it has been freed, it can lead to undefined behavior, including potential system crashes or exploitation by malicious users. The vulnerability has been addressed in subsequent kernel updates.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, no specific workarounds are recommended for this vulnerability. The best course of action is to apply the kernel update as soon as it becomes available.
Conclusion
CVE-2023-52913 is a critical vulnerability in the Linux kernel's i915 graphics driver that can lead to serious security implications due to improper handling of context pointers. Users are strongly advised to update their systems to the latest kernel version to protect against potential exploits.
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FAQ
CVE-2023-52913 is a vulnerability in the Linux kernel's i915 graphics driver that can lead to a use-after-free condition, potentially allowing unauthorized access or system crashes.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. By uploading your manifest file, you can check if your application is affected by CVE-2023-52913.
If exploited, this vulnerability could lead to system instability, crashes, or unauthorized access to system resources, posing a significant security risk.
Yes, the vulnerability has been fixed in Linux kernel version 6.1.7-1 and later for Debian 12 and 13.
While no specific workarounds are available, it is crucial to prioritize updating your kernel to mitigate the risks associated with this vulnerability.
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