{"id":"CVE-2026-90035","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix division by zero in get_estimated_bw()\n\nget_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity,\nwhich is zeroed by reset_bw_alloc_…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix division by zero in get_estimated_bw()\n\nget_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity,\nwhich is zeroed by reset_bw_alloc_…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8e5cfe547bf3beeb29d9608be68d22dff2b5012b < 4c5b61b9df6ab33b55f228e1b6579cefad11a9f7","Linux >= 8e5cfe547bf3beeb29d9608be68d22dff2b5012b < ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a","Linux >= 8e5cfe547bf3beeb29d9608be68d22dff2b5012b < 4814f28c45f58a71a80d09b80a60da6a063b539a","Linux >= 8e5cfe547bf3beeb29d9608be68d22dff2b5012b < b08c3d5ee7feadd821208f7c2c1ec02a16ce5878","Linux >= 8e5cfe547bf3beeb29d9608be68d22dff2b5012b < f63de9054da858d57054474c32464106f8375e0d","Linux 6.3"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:17:16.690","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90035","references":[{"url":"https://git.kernel.org/stable/c/4814f28c45f58a71a80d09b80a60da6a063b539a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.932Z","epss":0.00186,"epssPercentile":0.08498,"slug":"CVE-2026-90035","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix division by zero in get_estimated_bw()\n\nget_estimated_bw() divides by link->dpia_bw_alloc_config.bw_granularity,\nwhich is zeroed by reset_bw_alloc_struct() and only populated once\nDP_TUNNELING_BW_ALLOC_CAP_CHANGED has been handled.\n\nlink_dp_dpia_handle_bw_alloc_status(), the DPCD interrupt handler,\ncalls get_estimated_bw() whenever DP_TUNNELING_ESTIMATED_BW_CHANGED\nis set, independently of whether DP_TUNNELING_BW_ALLOC_CAP_CHANGED\nhas ever fired for that link. A connected USB4/DPIA tunneling device\nthat reports an estimated-bandwidth change before ever reporting a\ncapability change drives a division by zero in this IRQ path.\n\nlink_dpia_send_bw_alloc_request() already guards the same\nbw_granularity division; add the identical guard here rather than\nintroducing a new pattern.\n\n(cherry picked from commit f2a961457c33dc34223aad5c9e8971de34a4eed3)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}