CVE-2026-90035

CVE CVE-2026-90035EUVD EUVD-2026-80643Published 2026-09-16T10:33:35.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix division by zero in get_estimated_bw() get_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity, which is zeroed by reset_bw_alloc_struct() and only populated once DP_TUNNELING_BW_ALLOC_CAP_CHANGED has been handled. link_dp_dpia_handle_bw_alloc_status(), the DPCD interrupt handler, calls get_estimated_bw() whenever DP_TUNNELING_ESTIMATED_BW_CHANGED is set, independently of whether DP_TUNNELING_BW_ALLOC_CAP_CHANGED has ever fired for that link. A connected USB4/DPIA tunneling device that reports an estimated-bandwidth change before ever reporting a capability change drives a division by zero in this IRQ path. link_dpia_send_bw_alloc_request() already guards the same bw_granularity division; add the identical guard here rather than introducing a new pattern. (cherry picked from commit f2a961457c33dc34223aad5c9e8971de34a4eed3)

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.3; patch: 6.6.157; 8e5cfe547bf3beeb29d9608be68d22dff2b5012b <b08c3d5ee7feadd821208f7c2c1ec02a16ce5878; patch: 0; patch: 7.3-rc2; patch: 7.2.5; 8e5cfe547bf3beeb29d9608be68d22dff2b5012b <ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a; patch: 6.12.110; patch: 6.18.51; 8e5cfe547bf3beeb29d9608be68d22dff2b5012b <f63de9054da858d57054474c32464106f8375e0d; 8e5cfe547bf3beeb29d9608be68d22dff2b5012b <4c5b61b9df6ab33b55f228e1b6579cefad11a9f7; 8e5cfe547bf3beeb29d9608be68d22dff2b5012b <4814f28c45f58a71a80d09b80a60da6a063b539a

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Carried in the product catalogue

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Linux — Linux

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