CVE-2025-38672

Local denial of service via unstable dma_buf pointer

Published Aug 22, 2025 · Updated May 11, 2026

NULL-pointer dereference in Linux kernel 6.15 through 6.15.8 and 6.16-rc1 allows local users to crash the system through DRM GEM DMA. The DRM GEM DMA helper reads drm_gem_object.dma_buf after release of the final GEM handle has changed that field to NULL, instead of using the stable import_attach->dmabuf reference. Exploitation requires local low-privileged access to manipulate an imported buffer object, and the bounded consequence is availability loss from a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in Linux kernel 6.15 through 6.15.8 and 6.16-rc1 allows local users to crash the system through DRM GEM DMA. The DRM GEM DMA helper reads drm_gem_object.dma_buf after release of the final GEM handle has changed that field to NULL, instead of using the stable import_attach->dmabuf reference. Exploitation requires local low-privileged access to manipulate an imported buffer object, and the bounded consequence is availability loss from a kernel crash.

The record

CVE
CVE-2025-38672
Published
Aug 22, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 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=6.15
  2. Affected versionversion=e8afa1557f4f963c9a511bd2c6074a941c308685 <1918e79be908b8a2c8757640289bc196c14d928a
  3. Affected versionversion=e8afa1557f4f963c9a511bd2c6074a941c308685 <e7bdb3104a2f71ec1439d37f8e6e2f201dbcd7cf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=e8afa1557f4f963c9a511bd2c6074a941c308685 <1918e79be908b8a2c8757640289bc196c14d928a; version=e8afa1557f4f963c9a511bd2c6074a941c308685 <e7bdb3104a2f71ec1439d37f8e6e2f201dbcd7cf

Published CVSS scores

5.5UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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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