CVE-2025-39747

Kernel crash via unchecked metadata reallocation

Published Sep 11, 2025 · Updated Sep 11, 2025

NULL pointer dereference in the Linux kernel msm DRM driver allows local users to crash the system through GEM metadata setup. The msm_ioctl_gem_info_set_metadata() function fails to check whether krealloc returned NULL before continuing to use the resized metadata buffer. Exploitation requires low-privileged local access and allocation failure while the MSM DRM metadata ioctl is processed, limiting the reported consequence to a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.15%
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 the Linux kernel msm DRM driver allows local users to crash the system through GEM metadata setup. The msm_ioctl_gem_info_set_metadata() function fails to check whether krealloc returned NULL before continuing to use the resized metadata buffer. Exploitation requires low-privileged local access and allocation failure while the MSM DRM metadata ioctl is processed, limiting the reported consequence to a kernel crash.

The record

CVE
CVE-2025-39747
Published
Sep 11, 2025
Updated
Sep 11, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <01e3eda8edc3c4caaa49261d1a56c799b0bd6268
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c8c354098ea9d4376a58c96ae6b65288a6f15d8
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <53dc780c1e94ea782d8936b41bfaa83c663702eb
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d5386bcede7b57b193c658dcbb9d22004cde7580

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <01e3eda8edc3c4caaa49261d1a56c799b0bd6268; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1c8c354098ea9d4376a58c96ae6b65288a6f15d8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <53dc780c1e94ea782d8936b41bfaa83c663702eb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d5386bcede7b57b193c658dcbb9d22004cde7580

Published CVSS scores

5.5NIST NVDCVSS: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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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