CVE-2025-38355

Kernel crash via undrained GGTT removal workqueue

Published Jul 25, 2025 · Updated May 11, 2026

Race condition in the Linux kernel xe driver allows local users to crash the kernel during unsuccessful VF initialization. During managed-device unwind, ggtt_fini_early leaves deferred node-removal work queued after mmio_fini unmaps the MMIO/GSM mapping, so xe_ggtt_set_pte writes through an invalid mapping. Triggering the crash requires root or CAP_SYS_ADMIN access to bind or unbind a PCI device through sysfs, plus a probe failure outside the attacker's reliable control.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel xe driver allows local users to crash the kernel during unsuccessful VF initialization. During managed-device unwind, ggtt_fini_early leaves deferred node-removal work queued after mmio_fini unmaps the MMIO/GSM mapping, so xe_ggtt_set_pte writes through an invalid mapping. Triggering the crash requires root or CAP_SYS_ADMIN access to bind or unbind a PCI device through sysfs, plus a probe failure outside the attacker's reliable control.

The record

CVE
CVE-2025-38355
Published
Jul 25, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.12
  2. Affected versionversion=919bb54e989c1edef87e9797be125c94c450fc65 <1b12f8dabbb8fd7d5a2611dd7bc5982ffbc2e5df
  3. Affected versionversion=919bb54e989c1edef87e9797be125c94c450fc65 <5ab4eba9b26a93605b4f2f2b688d6ba818d7331d
  4. Affected versionversion=919bb54e989c1edef87e9797be125c94c450fc65 <af2b588abe006bd55ddd358c4c3b87523349c475

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=919bb54e989c1edef87e9797be125c94c450fc65 <1b12f8dabbb8fd7d5a2611dd7bc5982ffbc2e5df; version=919bb54e989c1edef87e9797be125c94c450fc65 <5ab4eba9b26a93605b4f2f2b688d6ba818d7331d; version=919bb54e989c1edef87e9797be125c94c450fc65 <af2b588abe006bd55ddd358c4c3b87523349c475

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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