CVE-2026-23468

Summary

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)

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/c833d6c7199c5b5fca9ec95593acd539ec9c171c
• https://git.kernel.org/stable/c/e620378aab78d415bd8a15a2f91c145906520288
• https://git.kernel.org/stable/c/2723e6851309531ce61aed74e93a0cd268cc862a
• https://git.kernel.org/stable/c/5ce4a38e6c2488949e373d5066303f9c128db614
• https://git.kernel.org/stable/c/f462624a6e4b5f1ec2664c2c53e408b2f4fb53e9
• https://git.kernel.org/stable/c/6270b1a5dab94665d7adce3dc78bc9066ed28bdd

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