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CVE-2026-98391— drm/xe: Guard page-fault worker with runtime PM check

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： drm/xe：通过运行时电源管理（runtime PM）检查来保护页面错误（page-fault）工作队列 在虚拟内存（VM）销毁过程中，该虚拟内存的运行时 PM 引用会被异步释放，导致设备可能进入自动挂起（autosuspend）状态，而属于已销毁虚拟内存的陈旧页面错误请求仍保留在队列中。当页面错误工作线程随后尝试确认（ack）其中一个请求时，会在已挂起的设备上调用 ，从而触发以下断言失败： 只要存在未完成的异步工作，活跃的虚拟内存或执行队列会一直持有 PM 引用。因此，

AI Predicted 4.3 Difficulty: Theoretical

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux f289f7807119128d4f9d59f34ac557549c7562e5< 25764620ec64c0142e2c87c41787f45540cf09ff affected
f289f7807119128d4f9d59f34ac557549c7562e5< 20fce5b34b21a995839743b4917a1edd2fd503ba affected
6.19 affected
< 6.19 unaffected
7.2.7≤ 7.2.* unaffected
7.3-rc3≤ * unaffected
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I. Basic Information for CVE-2026-98391

Vulnerability Information
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Vulnerability Title
drm/xe: Guard page-fault worker with runtime PM check
Source: CVE Program / CVE List V5
Vulnerability Description
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 `!xe_pm_runtime_suspended(xe)` 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]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f289f7807119128d4f9d59f34ac557549c7562e5 ~ 25764620ec64c0142e2c87c41787f45540cf09ff -
Linux Linux 6.19 -

II. Public POCs for CVE-2026-98391

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III. Intelligence Information for CVE-2026-98391

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Other References for CVE-2026-98391 (2)

Same Patch Batch · Linux · 2026-10-14 · 46 CVEs total

CVE-2026-98399 s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
CVE-2026-98395 powerpc/entry: Fix irq_soft_mask corruption on replayed interrupt exit
CVE-2026-98394 af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.
CVE-2026-98390 x86/amd_node: Avoid divide by zero on virtualized systems
CVE-2026-98389 drm/amdgpu: skip gfx switch_power_profile during GPU reset
CVE-2026-98388 exec: do_close_on_exec() before taking exec_update_lock
CVE-2026-98387 s390/crypto: Fix skcipher_walk return code handling in aes_s390
CVE-2026-98386 scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot
CVE-2026-98392 Bluetooth: btintel_pcie: fix tx_handle bounds off-by-one
CVE-2026-98398 locking/lockdep: Invalidate stale class_cache entries for zapped classes
CVE-2026-98397 platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
CVE-2026-98400 s390/ipl: Fix NULL deref in kdump without re-IPL parm block
CVE-2026-98402 net: icmp: avoid invalid transport header access in icmp_send tracepoint
CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation
CVE-2026-98403 s390/boot: Avoid IPL parameter append past command line
CVE-2026-98404 drm/virtio: Fix a NULL vs ERR_PTR() bug in virtio_gpu_user_framebuffer_create()
CVE-2026-98405 smb: client: fix missing iov bounds check in parse_posix_sids()
CVE-2026-98406 wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
CVE-2026-98408 watchdog: rzv2h: Avoid division by zero
CVE-2026-98407 wifi: rsi: fix heap OOB write on key removal

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98391

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