Linux Kernel up to 6.15.8 dma_buf null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.15.8. This affects the function dma_buf. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2025-38672. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.15.8. Affected is the function dma_buf. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/gem-dma: Use dma_buf from GEM object instance" This reverts commit e8afa1557f4f963c9a511bd2c6074a941c308685. The dma_buf field in struct drm_gem_object is not stable over the object instance's lifetime. The field becomes NULL when user space releases the final GEM handle on the buffer object. This resulted in a NULL-pointer deref. Workarounds in commit 5307dce878d4 ("drm/gem: Acquire references on GEM handles for framebuffers") and commit f6bfc9afc751 ("drm/framebuffer: Acquire internal references on GEM handles") only solved the problem partially. They especially don't work for buffer objects without a DRM framebuffer associated. Hence, this revert to going back to using .import_attach->dmabuf. v3: - cc stable

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-38672 since 04/16/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 260425 (Linux Distros Unpatched Vulnerability : CVE-2025-38672), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.15.9 eliminates this vulnerability. Applying the patch e7bdb3104a2f71ec1439d37f8e6e2f201dbcd7cf/1918e79be908b8a2c8757640289bc196c14d928a is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (260425) and CERT Bund (WID-SEC-2025-1898). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp AFF
  • NetApp ActiveIQ Unified Manager
  • SUSE openSUSE
  • Dell Avamar
  • NetApp FAS
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 260425
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-38672

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.15.9
Patch: e7bdb3104a2f71ec1439d37f8e6e2f201dbcd7cf/1918e79be908b8a2c8757640289bc196c14d928a

Timelineinfo

04/16/2025 CVE reserved
08/22/2025 +128 days Advisory disclosed
08/22/2025 +0 days VulDB entry created
02/14/2026 +176 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38672 (🔒)
GCVE (CVE): GCVE-0-2025-38672
GCVE (VulDB): GCVE-100-321120
CERT Bund: WID-SEC-2025-1898 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 08/22/2025 23:39
Updated: 02/14/2026 16:44
Changes: 08/22/2025 23:39 (58), 09/02/2025 22:43 (2), 09/22/2025 06:23 (7), 10/18/2025 07:35 (1), 10/26/2025 12:28 (1), 11/26/2025 13:49 (11), 12/13/2025 14:16 (1), 02/14/2026 16:44 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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