CVE-2025-38240

Local kernel crash via premature DRM logging

Published Apr 18, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux's MediaTek DisplayPort driver allows local users to crash the kernel during HPD handling. mtk_dp_wait_hpd_asserted and mtk_dp_parse_capabilities call DRM logging with drm_dev before mtk_dp_bridge_attach assigns that pointer. Reachability requires a MediaTek DP or eDP panel probe to enter the HPD error path; the reported consequence is a kernel crash without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.26%
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's MediaTek DisplayPort driver allows local users to crash the kernel during HPD handling. mtk_dp_wait_hpd_asserted and mtk_dp_parse_capabilities call DRM logging with drm_dev before mtk_dp_bridge_attach assigns that pointer. Reachability requires a MediaTek DP or eDP panel probe to enter the HPD error path; the reported consequence is a kernel crash without confidentiality or integrity impact.

The record

CVE
CVE-2025-38240
Published
Apr 18, 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. Apr 18, 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=6.6
  2. Affected versionversion=7eacba9a083be65c0f251c19380ec01147c01ebc <106a6de46cf4887d535018185ec528ce822d6d84
  3. Affected versionversion=7eacba9a083be65c0f251c19380ec01147c01ebc <13ec849fd2eab808ee8eba2625df7ebea3b85edf
  4. Affected versionversion=7eacba9a083be65c0f251c19380ec01147c01ebc <149a5c38436c229950cf1020992ce65c9549bc19
  5. Affected versionversion=7eacba9a083be65c0f251c19380ec01147c01ebc <2fda391ef7a701748abd7fa32232981b522c1e07
  6. Affected versionversion=7eacba9a083be65c0f251c19380ec01147c01ebc <57a9fb47551b33cde7b76d17c0072c3b394f4620

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=7eacba9a083be65c0f251c19380ec01147c01ebc <106a6de46cf4887d535018185ec528ce822d6d84; version=7eacba9a083be65c0f251c19380ec01147c01ebc <13ec849fd2eab808ee8eba2625df7ebea3b85edf; version=7eacba9a083be65c0f251c19380ec01147c01ebc <149a5c38436c229950cf1020992ce65c9549bc19; version=7eacba9a083be65c0f251c19380ec01147c01ebc <2fda391ef7a701748abd7fa32232981b522c1e07; version=7eacba9a083be65c0f251c19380ec01147c01ebc <57a9fb47551b33cde7b76d17c0072c3b394f4620

Published CVSS scores

5.5Canonical UbuntuCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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