CVE-2024-46728 in Linux
Summary
by MITRE • 09/18/2024
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Check index for aux_rd_interval before using
aux_rd_interval has size of 7 and should be checked.
This fixes 3 OVERRUN and 1 INTEGER_OVERFLOW issues reported by Coverity.
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Analysis
by VulDB Data Team • 04/05/2026
The vulnerability identified as CVE-2024-46728 resides within the Linux kernel's graphics subsystem, specifically in the amdgpu display driver component. This issue manifests as a buffer overflow condition that occurs during auxiliary channel read interval processing. The flaw exists in the display driver's handling of the aux_rd_interval parameter which is designed to have a maximum size of seven elements. The vulnerability represents a critical security concern as it allows for potential memory corruption and arbitrary code execution within kernel space.
The technical implementation of this vulnerability stems from insufficient input validation within the drm/amd/display subsystem. When processing auxiliary channel read operations, the driver fails to validate that the aux_rd_interval index remains within the bounds of its allocated memory space. This oversight creates a classic buffer overrun condition where an attacker could potentially supply an index value exceeding the seven-element limit, causing memory corruption in adjacent data structures. The vulnerability was detected through static analysis tools and specifically flagged by Coverity as reporting three distinct overflow conditions along with one integer overflow scenario.
The operational impact of this vulnerability extends beyond simple memory corruption, as it provides a potential pathway for privilege escalation attacks within the Linux kernel environment. An attacker with local access could exploit this condition to execute malicious code with kernel-level privileges, effectively compromising the entire system. The severity is amplified by the fact that this vulnerability exists within the graphics display subsystem, which is frequently accessed during normal system operations. The integer overflow component particularly concerns security professionals as it can lead to unpredictable behavior and potential exploitation through crafted input sequences that manipulate the index values.
Mitigation strategies for CVE-2024-46728 should prioritize immediate patch application from kernel maintainers, as this vulnerability affects core system functionality. System administrators should ensure all affected systems receive updates promptly, particularly those running AMD graphics hardware with the amdgpu driver. Additional defensive measures include implementing kernel module hardening techniques and monitoring for anomalous behavior in graphics subsystem access patterns. The vulnerability aligns with CWE-129 which addresses insufficient validation of array indices, and represents a potential entry point for ATT&CK techniques involving privilege escalation and kernel exploitation. Organizations should also conduct comprehensive vulnerability assessments to identify systems utilizing affected kernel versions and implement proper access controls to minimize potential attack surface exposure.