{"cve":"CVE-2026-99090","nvd":{"published":"2026-10-26T15:16:47.817","modified":"2026-10-26T15:16:47.817","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: serialize vblank counter reads against GPU reset\n\nThe vblank counter callback reads display registers and scanout\nposition without holding reset_domain->sem. During GPU recovery,\ndisplay commit work can call the callback while reset owns the\nsemaphore for writing. The hardware access then triggers the\nlockdep_assert_held() in amdgpu_device_skip_hw_access() and sets\nTAINT_WARN when lockdep is enabled.\n\nTry to acquire the reset semaphore for reading before accessing the\nhardware, and hold it across the counter and scanout-position reads.\nIf reset is already in progress, return DRM's cached software vblank\ncount instead. This avoids blocking behind reset and avoids accessing\ndisplay hardware while it is being reset.\n\nThe cached count is less accurate than the hardware count, but is\nused only when reset prevents a safe hardware read. This addresses\nthe reset-time warning from this vblank path; it does not suppress or\nfix unrelated lockdep warnings.\n\n(cherry picked from commit 51a4359f7431a4be5e42803c8bdaf7e0e5be2934)","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/037796d9ca1da97978deaefd88ca5649f6cb69f5","https://git.kernel.org/stable/c/11b6193c8841a052b7907006ffb1e02468b1448e","https://git.kernel.org/stable/c/1a6023edfbb5673f55fab6348f135fb3b1428ea5","https://git.kernel.org/stable/c/8d6f773d7479034a574ecc3b585bcd07d46b4824","https://git.kernel.org/stable/c/f4a0a1ce147d1a6e428d7cb5e3b99fd695139fc7"],"products":[],"source":"nvd","synced_at":"2026-10-26T15:46:46.147992833+00:00"},"epss":null,"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}