CVE-2026-98391
drm/xe: Guard page-fault worker with runtime PM check
Published Oct 14, 2026 · updated Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Guard page-fault worker with runtime PM check During VM teardown, the VM's runtime PM reference is dropped asynchronously, allowing the device to autosuspend while stale page faults belonging to the now-dead VM are still queued. When the page-fault worker later tries to ack one of these, it calls into guc_ct_send_locked() on an already-suspended device, tripping: Assertion failed! WARNING at xe_device.c:1267 xe_device_assert_mem_access+0x11c/0x140 [xe] A live VM/exec queue always holds a PM reference while it has outstanding work, so if the device is suspended at ack time, the owning context is already gone and the fault is stale. Take a runtime PM reference across the entire pagefault queue worker to safely deliver acks for torn-down VMs. v3: - Move PM ref to the generic xe_pagefault_queue_work using guard(xe_pm_runtime)(xe) instead of tracking it in the GuC backend(Matt Brost). v2: - Hold PM ref across the entire batch (begin/end) instead of per-ack. This prevents the device from autosuspending mid-batch, which would leave write_only acks written but the end flush skipped, and skip counter++, desyncing the cadence check.(Himal) - Add a comment explaining stale faults.(Himal) (cherry picked from commit fcc2431d2213dc4d04250c4f1ae87d9c3ae0d455) [Rodrigo: Added xe_device struct for compatibility while cherry-picking]
Code
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Timeline
Detection, updates, and resolution for this record.
Oct 14, 2026 · OSV.dev
Detected
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Guard page-fault worker with runtime PM check During VM teardown, the VM's runtime PM reference is dropped asynchronously, allowing the device to autosuspend while stale page faults belonging to the now-dead VM are still queued. When the page-fault worker later tries to ack one of these, it calls into guc_ct_send_locked()
Oct 15, 2026 · OSV.dev
Fix available
Kernel fixed in 7.2.7
Oct 15, 2026 · OSV.dev
Fix available
Kernel fixed in 7.2.7
Oct 15, 2026 · OSV.dev
Updated
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Guard page-fault worker with runtime PM check During VM teardown, the VM's runtime PM reference is dropped asynchronously, allowing the device to autosuspend while stale page faults belonging to the now-dead VM are still queued. When the page-fault worker later tries to ack one of these, it calls into guc_ct_send_locked()
Affected
- Linux Kernel6.19.0 → 7.2.7
Sources
- CVE.orgVulnerability recordCVE-2026-98391
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-98391
30-day exploitation probability 0.2%
first.org - OSV.devPackage advisoryCVE-2026-98391
drm/xe: Guard page-fault worker with runtime PM check
osv.dev - Tenable CVE DatabaseVulnerability recordCVE-2026-98391
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Guard page-fault worker with runtime PM check During VM teardown, the VM's runtime PM reference is dropped asynchronously, allowing the device to autosuspend while stale page faults belonging to the now-dead VM are still queued. When the page-fault worker later tries to ack one of these, it calls into guc_ct_send_locked()
tenable.com