CVE-2026-53135None▾ Sunlit

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

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 checkin…

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Jun 25, 2026

Updated

Nov 6, 2026

CVSS

—

Vendor

Linux

Product

Linux

CWE

—

Depth score

3 · Minimal

EPSS

0.12% · p2

Platforms

—

Source

CVEORG

Vector

—

CISA SSVC

decided 2026-11-06

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 6.

0.1% → 0.1%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 134 days

Jun 25, 2026Published
Disclosed via CVEORG
Nov 6, 2026Record revised
Last analysed / modified upstream
Nov 6, 2026EPSS first tracked
0.1%

Linux #cve.org

Affected

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < ee9cfcf77a8e8af637396dc00966df5f701e661c
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < b781f90a9528555c709e59789550893581ef0be4
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < a2de1d71891a038a9346b2c1a72b88c8350f2479
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7fc4fab4acc307ad2903312c195872b2953d32c3
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7ae95c0275c330b5dbae806f8e431720edad776f
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < bb6f705b73b5f191f14ad004e2c8c4b615806187
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < c90954cdea4d6998ec345de0d840d030c145b89e
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < adf67034b1f61f7119295208085bfd43f85f56af
Linux 5.2

Full technical detail▾

Overview

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)

Affected

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < ee9cfcf77a8e8af637396dc00966df5f701e661c
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < b781f90a9528555c709e59789550893581ef0be4
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < a2de1d71891a038a9346b2c1a72b88c8350f2479
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7fc4fab4acc307ad2903312c195872b2953d32c3
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7ae95c0275c330b5dbae806f8e431720edad776f
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < bb6f705b73b5f191f14ad004e2c8c4b615806187
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < c90954cdea4d6998ec345de0d840d030c145b89e
Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < adf67034b1f61f7119295208085bfd43f85f56af
Linux 5.2

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

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

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

Overview

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

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

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)

Affected

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < ee9cfcf77a8e8af637396dc00966df5f701e661c

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < b781f90a9528555c709e59789550893581ef0be4

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < a2de1d71891a038a9346b2c1a72b88c8350f2479

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7fc4fab4acc307ad2903312c195872b2953d32c3

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7ae95c0275c330b5dbae806f8e431720edad776f

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < bb6f705b73b5f191f14ad004e2c8c4b615806187

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < c90954cdea4d6998ec345de0d840d030c145b89e

Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < adf67034b1f61f7119295208085bfd43f85f56af

Linux 5.2