CVE-2025-68207

Kernel code execution via Dead CT use-after-free

Published Dec 16, 2025 · Updated Dec 16, 2025

Use-after-free in Linux kernel 6.12.37 through 6.12.58 and 6.13 through 6.17.8 allows local users to execute kernel code. The Dead CT worker in drivers/gpu/drm/xe/xe_guc_ct.c can continue dereferencing and modifying Xe resources after device unbinding frees them. On CONFIG_DRM_XE_DEBUG builds, ordinary render-node access permits fault flooding to align the worker with teardown, enabling kernel-memory disclosure, heap corruption, panic, or hang.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 6.12.37 through 6.12.58 and 6.13 through 6.17.8 allows local users to execute kernel code. The Dead CT worker in drivers/gpu/drm/xe/xe_guc_ct.c can continue dereferencing and modifying Xe resources after device unbinding frees them. On CONFIG_DRM_XE_DEBUG builds, ordinary render-node access permits fault flooding to align the worker with teardown, enabling kernel-memory disclosure, heap corruption, panic, or hang.

The record

CVE
CVE-2025-68207
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.13
  2. Affected versionversion=d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c <95af8f4fdce8349a5fe75264007f1af2aa1082ea
  3. Affected versionversion=d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c <ce6ccf8e881a919bf902174ac879f80c97669498
  4. Affected versionversion=ff6482fb458953e111a82b7c537363d9aacf04bf <35959ab7d16b618616edf6df882a4533d2efe193

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c <95af8f4fdce8349a5fe75264007f1af2aa1082ea; version=d2c5a5a926f43b2e42c5c955f917bad8ad6dd68c <ce6ccf8e881a919bf902174ac879f80c97669498; version=ff6482fb458953e111a82b7c537363d9aacf04bf <35959ab7d16b618616edf6df882a4533d2efe193

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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