Signed Integer Truncation in Linux Kernel accel/ivpu Driver

Executive Summary

This vulnerability exists in the Linux kernel's accel/ivpu component where a signed integer truncation occurs during IPC receive operations.

Specifically, firmware-supplied data_size is cast to a signed int before being used in a min_t() function. When large unsigned values (greater than or equal to 0x80000000) are cast to signed int, they become negative, which causes an unsigned wraparound.

This wraparound leads to oversized memcpy operations that can overflow the stack buffer, potentially causing memory corruption.

The fix involved changing min_t(int, ...) to min() since both values are unsigned and can be safely handled without casting.

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Impact Analysis

This vulnerability can lead to a buffer overflow in the Linux kernel, which may cause memory corruption.

Such memory corruption could potentially be exploited to execute arbitrary code, cause system crashes, or escalate privileges depending on the attacker's capabilities and system configuration.

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Mitigation Strategies

The vulnerability is fixed by correcting the signed integer truncation in the Linux kernel's accel/ivpu component. To mitigate this vulnerability, you should update your Linux kernel to a version that includes this fix.

Specifically, ensure your system is running a kernel version released after 2026-06-25 that addresses this issue.

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