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CVE-2026-53135

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs [Why & How] dp_sdp_message_debugfs_write() dereferences con…

Published Jun 25, 2026CWE-476EPSS 0.12%

Overview

CVE-2026-53135 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs

[Why & How]

dp_sdp_message_debugfs_write() dereferences connector->base.state->crtc

without checking for NULL. A connector can be connected but not bound to

any CRTC (e.g. after hot-plug before the next atomic commit), causing a

kernel crash when writing to the sdp_message debugfs node.

The function also ignores the user-provided size argument and always

passes 36 bytes to copy_from_user(), reading past the user buffer when

size < 36.

Fix both issues by:

- Returning -ENODEV when connector->base.state or state->crtc is NULL

- Clamping write_size to min(size, sizeof(data))

(cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776fRefgit.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3Refgit.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479Refgit.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56afRefgit.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4Refgit.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187Refgit.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89eRefgit.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53135?

CVE-2026-53135 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53135?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53135?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53135?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53135 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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