CVE-2024-50282 in Linux
Summary
by MITRE • 11/19/2024
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()
Avoid a possible buffer overflow if size is larger than 4K.
(cherry picked from commit f5d873f5825b40d886d03bd2aede91d4cf002434)
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Analysis
by VulDB Data Team • 07/16/2025
The vulnerability identified as CVE-2024-50282 resides within the Linux kernel's graphics driver subsystem, specifically in the amdgpu driver component that manages AMD GPU hardware. This issue manifests in the debugfs interface where the amdgpu_debugfs_gprwave_read() function fails to properly validate buffer sizes during data retrieval operations. The flaw represents a classic buffer overflow vulnerability that could potentially be exploited to execute arbitrary code or cause system instability when maliciously crafted data attempts to exceed the allocated buffer boundaries.
The technical implementation of this vulnerability stems from insufficient input validation within the graphics debugging interface. When the amdgpu driver processes requests for GPU register wave data through the debugfs mechanism, it does not adequately verify that the requested data size remains within acceptable limits. This missing size check creates a condition where a malicious actor could submit a request with a size parameter exceeding the 4KB buffer limit, leading to memory corruption that may result in privilege escalation or system crashes. The vulnerability directly aligns with CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows data to be written beyond the allocated buffer space.
The operational impact of this vulnerability extends beyond simple system instability to potentially enable sophisticated attack vectors within the graphics processing context. An attacker with access to the debugfs interface could leverage this flaw to gain elevated privileges within the kernel space, as the buffer overflow could be manipulated to overwrite critical kernel memory structures. This represents a significant concern for systems running AMD GPU hardware where the debugfs interface remains accessible, particularly in enterprise environments where kernel-level access might be available to untrusted users. The vulnerability affects systems using AMD graphics hardware through the amdgpu driver and could potentially be exploited in scenarios where debugfs interfaces are improperly secured.
The resolution for CVE-2024-50282 involves implementing proper size validation within the amdgpu_debugfs_gprwave_read() function to ensure that buffer sizes never exceed the 4KB limit. This fix follows standard security practices for preventing buffer overflow conditions and aligns with the principle of least privilege in kernel space operations. The patch addresses the vulnerability by adding explicit size checks that prevent data from being written beyond allocated buffer boundaries, effectively closing the potential attack vector. Organizations should prioritize applying this kernel update as it represents a critical security fix that mitigates potential privilege escalation risks and system stability issues. The fix also demonstrates adherence to secure coding practices recommended by the ATT&CK framework for kernel-level vulnerabilities, specifically addressing techniques related to privilege escalation through memory corruption exploits.