VulnerabilityPublished 25 Jun 2026Updated 6 Nov 2026

CVE-2026-53135: Linux kernel · drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ee9cfcf77a8e8af637396dc00966df5f701e661c : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in ee9cfcf77a8e8af637396dc00966df5f701e661c, c90954cdea4d6998ec345de0d840d030c145b89e, bb6f705b73b5f191f14ad004e2c8c4b615806187 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < ee9cfcf77a8e8af637396dc00966df5f701e661c	Fixed in ee9cfcf77a8e8af637396dc00966df5f701e661c
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < c90954cdea4d6998ec345de0d840d030c145b89e	Fixed in c90954cdea4d6998ec345de0d840d030c145b89e
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < bb6f705b73b5f191f14ad004e2c8c4b615806187	Fixed in bb6f705b73b5f191f14ad004e2c8c4b615806187
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < b781f90a9528555c709e59789550893581ef0be4	Fixed in b781f90a9528555c709e59789550893581ef0be4
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < adf67034b1f61f7119295208085bfd43f85f56af	Fixed in adf67034b1f61f7119295208085bfd43f85f56af
LinuxLinux	Affected ≥ c7ba3653e9773256b2b08508a2ed2ca28ea7566b, < a2de1d71891a038a9346b2c1a72b88c8350f2479	Fixed in a2de1d71891a038a9346b2c1a72b88c8350f2479

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)

References

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