CVE-2026-90035drm/amd/display: fix division by zero in get_estimated_bw()
- —Not scoredno CVSS score yet
- 0.19%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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)
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.19% · top 92% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 8e5cfe547bf3beeb29d9608be68d22dff2b5012b – < 4c5b61b9df6ab33b55f228e1b6579cefad11a9f7
- affected 8e5cfe547bf3beeb29d9608be68d22dff2b5012b – < ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a
- affected 8e5cfe547bf3beeb29d9608be68d22dff2b5012b – < 4814f28c45f58a71a80d09b80a60da6a063b539a
- affected 8e5cfe547bf3beeb29d9608be68d22dff2b5012b – < b08c3d5ee7feadd821208f7c2c1ec02a16ce5878
- affected 8e5cfe547bf3beeb29d9608be68d22dff2b5012b – < f63de9054da858d57054474c32464106f8375e0d
- affected 6.3
- unaffected < 6.3
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/4c5b61b9df6ab33b55f228e1b6579cefad11a9f7 (opens in a new tab)
- https://git.kernel.org/stable/c/ac2ab58a79bf2401ae8c5d1c030bf0a5a376f43a (opens in a new tab)
- https://git.kernel.org/stable/c/4814f28c45f58a71a80d09b80a60da6a063b539a (opens in a new tab)
- https://git.kernel.org/stable/c/b08c3d5ee7feadd821208f7c2c1ec02a16ce5878 (opens in a new tab)
- https://git.kernel.org/stable/c/f63de9054da858d57054474c32464106f8375e0d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-80643 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-90035)Record last updated .