CVE-2025-68189

Kernel warning via imported dma-buf cleanup misclassification

Published Dec 16, 2025 · Updated Dec 16, 2025

Improper GEM cleanup in Linux 6.17 through 6.17.7 allows local users to trigger a kernel warning by closing an imported dma-buf. In msm_gem_free_object, the _NO_SHARE branch classifies imported dma-bufs only by flags and fails to recognize their external reservation object before freeing them. The path requires local low-privileged DRM ioctl access on a system using the MSM graphics driver; published reproduction shows a warning during IRIS video playback.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper GEM cleanup in Linux 6.17 through 6.17.7 allows local users to trigger a kernel warning by closing an imported dma-buf. In msm_gem_free_object, the _NO_SHARE branch classifies imported dma-bufs only by flags and fails to recognize their external reservation object before freeing them. The path requires local low-privileged DRM ioctl access on a system using the MSM graphics driver; published reproduction shows a warning during IRIS video playback.

The record

CVE
CVE-2025-68189
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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

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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=6.17
  2. Affected versionversion=de651b6e040ba419418a37401e45d24f133e8a59 <9674c4cb2fe62727a2e4d3f66065ab949dfa61be
  3. Affected versionversion=de651b6e040ba419418a37401e45d24f133e8a59 <c34e08ba6c0037a72a7433741225b020c989e4ae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.17; version=de651b6e040ba419418a37401e45d24f133e8a59 <9674c4cb2fe62727a2e4d3f66065ab949dfa61be; version=de651b6e040ba419418a37401e45d24f133e8a59 <c34e08ba6c0037a72a7433741225b020c989e4ae

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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