CVE-2025-39882

Local kernel compromise via device-tree node over-release

Published Sep 23, 2025 · Updated Sep 23, 2025

Use-after-free in Linux 6.6.105 through 6.6.106, 6.12.45 through 6.12.47, and 6.16.5 through 6.16.7 allows local users to compromise the kernel. During mtk_drm_get_all_drm_priv() iteration, an extra of_node_put() decrements each child after for_each_child_of_node() has already released its reference, leaving reachable device_node objects freed. Exploitation requires local code on MediaTek hardware with the driver active; reclaimed node callbacks permit kernel control-flow hijacking, while warning paths can panic the host.

CVSS severity8.4
High
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

Use-after-free in Linux 6.6.105 through 6.6.106, 6.12.45 through 6.12.47, and 6.16.5 through 6.16.7 allows local users to compromise the kernel. During mtk_drm_get_all_drm_priv() iteration, an extra of_node_put() decrements each child after for_each_child_of_node() has already released its reference, leaving reachable device_node objects freed. Exploitation requires local code on MediaTek hardware with the driver active; reclaimed node callbacks permit kernel control-flow hijacking, while warning paths can panic the host.

The record

CVE
CVE-2025-39882
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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=1f403699c40f0806a707a9a6eed3b8904224021a <4de37a48b6b58faaded9eb765047cf0d8785ea18
  2. Affected versionversion=31ce7c089b50c3d3056c37e0e25e7535e4428ae1 <b58a26cdd4795c1ce6a80e38e9348885555dacd6
  3. Affected versionversion=6.17-rc4
  4. Affected versionversion=7d98166183d627c0b9daca7672b2191fae0f8a03 <b2fbe0f9f80b9cfa1e06ddcf8b863d918394ef1d
  5. Affected versionversion=fae58d0155a979a8c414bbc12db09dd4b2f910d0 <c4901802ed1ce859242e10af06e6a7752cba0497

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1f403699c40f0806a707a9a6eed3b8904224021a <4de37a48b6b58faaded9eb765047cf0d8785ea18; version=31ce7c089b50c3d3056c37e0e25e7535e4428ae1 <b58a26cdd4795c1ce6a80e38e9348885555dacd6; version=6.17-rc4; version=7d98166183d627c0b9daca7672b2191fae0f8a03 <b2fbe0f9f80b9cfa1e06ddcf8b863d918394ef1d; version=fae58d0155a979a8c414bbc12db09dd4b2f910d0 <c4901802ed1ce859242e10af06e6a7752cba0497

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.4LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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