EUVD-2026-18736
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3Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Limit BO list entry count to prevent resource exhaustion Userspace can pass an arbitrary number of BO list entries via the bo_number field. Although the previous multiplication overflow check prevents out-of-bounds allocation, a large number of entries could still cause excessive memory allocation (up to potentially gigabytes) and unnecessarily long list processing times. Introduce a hard limit of 128k entries per BO list, which is more than sufficient for any realistic use case (e.g., a single list containing all buffers in a large scene). This prevents memory exhaustion attacks and ensures predictable performance. Return -EINVAL if the requested entry count exceeds the limit (cherry picked from commit 688b87d39e0aa8135105b40dc167d74b5ada5332)
Analysis
Denial of service in Linux kernel amdgpu driver allows local attackers to exhaust system memory by passing an arbitrarily large BO (buffer object) list entry count via userspace, bypassing existing overflow checks but causing excessive allocation and processing delays; fixed by enforcing a 128k entry limit per BO list.
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