CVE-2025-38674

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2025-38674
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38674.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-38674
Downstream
Published
2025-08-22T16:03:04.418Z
Modified
2026-03-13T01:04:58.201940Z
Summary
Revert "drm/prime: Use dma_buf from GEM object instance"
Details

In the Linux kernel, the following vulnerability has been resolved:

Revert "drm/prime: Use dma_buf from GEM object instance"

This reverts commit f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8.

The dmabuf field in struct drmgem_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

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38674.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8
Fixed
5f05d83ce689a8930a70dfa73f879604aef8cc03
Fixed
fb4ef4a52b79a22ad382bfe77332642d02aef773

Affected versions

v6.*
v6.14
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.15
v6.15-rc1
v6.15-rc2
v6.15-rc3
v6.15-rc4
v6.15-rc5
v6.15-rc6
v6.15-rc7
v6.15.1
v6.15.2
v6.15.3
v6.15.4
v6.15.5
v6.15.6
v6.15.7
v6.15.8
v6.16-rc1

Database specific

vanir_signatures 
[
    {
        "signature_type": "Function",
        "deprecated": false,
        "id": "CVE-2025-38674-25b5b651",
        "target": {
            "file": "drivers/gpu/drm/drm_prime.c",
            "function": "drm_gem_prime_handle_to_dmabuf"
        },
        "digest": {
            "length": 880.0,
            "function_hash": "114706201934632684125572932394402582983"
        },
        "signature_version": "v1",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fb4ef4a52b79a22ad382bfe77332642d02aef773"
    },
    {
        "signature_type": "Line",
        "deprecated": false,
        "id": "CVE-2025-38674-d4dbc545",
        "target": {
            "file": "drivers/gpu/drm/drm_prime.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "74169586154841505553505784181076649286",
                "191378302901381859884326265641488942682",
                "139478451286773756021743450157595416902"
            ]
        },
        "signature_version": "v1",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@5f05d83ce689a8930a70dfa73f879604aef8cc03"
    },
    {
        "signature_type": "Line",
        "deprecated": false,
        "id": "CVE-2025-38674-f379a25e",
        "target": {
            "file": "drivers/gpu/drm/drm_prime.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "74169586154841505553505784181076649286",
                "191378302901381859884326265641488942682",
                "139478451286773756021743450157595416902"
            ]
        },
        "signature_version": "v1",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fb4ef4a52b79a22ad382bfe77332642d02aef773"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "id": "CVE-2025-38674-f77e87f7",
        "target": {
            "file": "drivers/gpu/drm/drm_prime.c",
            "function": "drm_gem_prime_handle_to_dmabuf"
        },
        "digest": {
            "length": 880.0,
            "function_hash": "114706201934632684125572932394402582983"
        },
        "signature_version": "v1",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@5f05d83ce689a8930a70dfa73f879604aef8cc03"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38674.json"