CVE-2025-38674

Kernel crash via unstable GEM dma_buf pointer

Published Aug 22, 2025 · Updated May 11, 2026

Null-pointer dereference in Linux kernel 6.15 through 6.15.8 allows local users to crash the kernel through DRM PRIME buffer handling. The DRM PRIME path reads drm_gem_object.dma_buf after the final userspace GEM handle clears that unstable pointer, rather than using the retained import_attach->dmabuf reference. A low-privileged local user must exercise an affected DRM buffer-object path; dereferencing the cleared pointer interrupts the host by crashing the kernel.

CVSS severity5.7
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 allows local users to crash the kernel through DRM PRIME buffer handling. The DRM PRIME path reads drm_gem_object.dma_buf after the final userspace GEM handle clears that unstable pointer, rather than using the retained import_attach->dmabuf reference. A low-privileged local user must exercise an affected DRM buffer-object path; dereferencing the cleared pointer interrupts the host by crashing the kernel.

The record

CVE
CVE-2025-38674
Published
Aug 22, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, 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=f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8 <5f05d83ce689a8930a70dfa73f879604aef8cc03
  3. Affected versionversion=f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8 <fb4ef4a52b79a22ad382bfe77332642d02aef773

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8 <5f05d83ce689a8930a70dfa73f879604aef8cc03; version=f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8 <fb4ef4a52b79a22ad382bfe77332642d02aef773

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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

CWE-476NULL Pointer Dereference
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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