{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90035","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.782Z","datePublished":"2026-09-16T10:33:35.281Z","dateUpdated":"2026-09-16T10:33:35.281Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-16T10:33:35.281Z"},"descriptions":[{"lang":"en","value":"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_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)"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"],"versions":[{"version":"8e5cfe547bf3beeb29d9608be68d22dff2b5012b","lessThan":"4c5b61b9df6ab33b55f228e1b6579cefad11a9f7","status":"affected","versionType":"git"},{"version":"8e5cfe547bf3beeb29d9608be68d22dff2b5012b","lessThan":"ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a","status":"affected","versionType":"git"},{"version":"8e5cfe547bf3beeb29d9608be68d22dff2b5012b","lessThan":"4814f28c45f58a71a80d09b80a60da6a063b539a","status":"affected","versionType":"git"},{"version":"8e5cfe547bf3beeb29d9608be68d22dff2b5012b","lessThan":"b08c3d5ee7feadd821208f7c2c1ec02a16ce5878","status":"affected","versionType":"git"},{"version":"8e5cfe547bf3beeb29d9608be68d22dff2b5012b","lessThan":"f63de9054da858d57054474c32464106f8375e0d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c"],"versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.5","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.3-rc2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7"},{"url":"https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a"},{"url":"https://git.kernel.org/stable/c/4814f28c45f58a71a80d09b80a60da6a063b539a"},{"url":"https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878"},{"url":"https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d"}],"title":"drm/amd/display: fix division by zero in get_estimated_bw()","x_generator":{"engine":"bippy-1.2.0"}}}}