{"schema":"threatline.record/2","record":{"id":"CVE-2026-98391","aliases":[],"summary":"drm/xe: Guard page-fault worker with runtime PM check","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Guard page-fault worker with runtime PM check\n\nDuring VM teardown, the VM's runtime PM reference is dropped\nasynchronously, allowing the device to autosuspend while stale page\nfaults belonging to the now-dead VM are still queued. When the\npage-fault worker later tries to ack one of these, it calls into\nguc_ct_send_locked() on an already-suspended device, tripping:\n\n  Assertion `!xe_pm_runtime_suspended(xe)` failed!\n  WARNING at xe_device.c:1267 xe_device_assert_mem_access+0x11c/0x140 [xe]\n\nA live VM/exec queue always holds a PM reference while it has\noutstanding work, so if the device is suspended at ack time, the\nowning context is already gone and the fault is stale.\n\nTake a runtime PM reference across the entire pagefault\nqueue worker to safely deliver acks for torn-down VMs.\n\nv3:\n - Move PM ref to the generic xe_pagefault_queue_work using\n   guard(xe_pm_runtime)(xe) instead of tracking it in the GuC\n   backend(Matt Brost).\n\nv2:\n - Hold PM ref across the entire batch (begin/end) instead of per-ack.\n   This prevents the device from autosuspending mid-batch, which would\n   leave write_only acks written but the end flush skipped, and skip\n   counter++, desyncing the cadence check.(Himal)\n - Add a comment explaining stale faults.(Himal)\n\n(cherry picked from commit fcc2431d2213dc4d04250c4f1ae87d9c3ae0d455)\n[Rodrigo: Added xe_device struct for compatibility while cherry-picking]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98391","source_modified_at":"2026-10-19T09:18:42.391Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"f289f7807119128d4f9d59f34ac557549c7562e5","lessThan":"25764620ec64c0142e2c87c41787f45540cf09ff","status":"affected","versionType":"git"},{"version":"f289f7807119128d4f9d59f34ac557549c7562e5","lessThan":"20fce5b34b21a995839743b4917a1edd2fd503ba","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98391","source_modified_at":"2026-10-19T09:18:42.391Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.19","status":"affected"},{"version":"0","lessThan":"6.19","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98391","source_modified_at":"2026-10-19T09:18:42.391Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"25764620ec64c0142e2c87c41787f45540cf09ff","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98391","source_modified_at":"2026-10-19T09:18:42.391Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"20fce5b34b21a995839743b4917a1edd2fd503ba","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00198,"percentile":0.09021,"score_date":"2026-10-23"},"published_at":"2026-10-14T13:25:55.498Z","modified_at":"2026-10-19T09:18:42.391Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98391","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:18:42.391Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98391","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/25764620ec64c0142e2c87c41787f45540cf09ff"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/20fce5b34b21a995839743b4917a1edd2fd503ba"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:18:42.391Z","content_hash":"f46b9baa8a9fb2d6c0750747d8fffe5a03dc8d131cbe8a7d9dc29874862320ee"}}