CVE-2023-53784
drm: bridge: dw_hdmi: fix connector access for scdc
Description
In the Linux kernel, the following vulnerability has been resolved: drm: bridge: dw_hdmi: fix connector access for scdc Commit 5d844091f237 ("drm/scdc-helper: Pimp SCDC debugs") changed the scdc interface to pick up an i2c adapter from a connector instead. However, in the case of dw-hdmi, the wrong connector was being used to pass i2c adapter information, since dw-hdmi's embedded connector structure is only populated when the bridge attachment callback explicitly asks for it. drm-meson is handling connector creation, so this won't happen, leading to a NULL pointer dereference. Fix it by having scdc functions access dw-hdmi's current connector pointer instead, which is assigned during the bridge enablement stage. [narmstrong: moved Fixes tag before first S-o-b and added Reported-by tag]
INFO
Published Date :
Dec. 9, 2025, 1:16 a.m.
Last Modified :
Dec. 9, 2025, 6:37 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Access dw-hdmi's current connector pointer.
- Ensure connector information is correctly populated.
- Apply updates addressing the connector access issue.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-53784.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/552f79aa9e801ed4f74d6b3221af78042ba4f235 | |
| https://git.kernel.org/stable/c/98703e4e061fb8715c7613cd227e32cdfd136b23 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-53784 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-53784
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-53784 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-53784 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dec. 09, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: drm: bridge: dw_hdmi: fix connector access for scdc Commit 5d844091f237 ("drm/scdc-helper: Pimp SCDC debugs") changed the scdc interface to pick up an i2c adapter from a connector instead. However, in the case of dw-hdmi, the wrong connector was being used to pass i2c adapter information, since dw-hdmi's embedded connector structure is only populated when the bridge attachment callback explicitly asks for it. drm-meson is handling connector creation, so this won't happen, leading to a NULL pointer dereference. Fix it by having scdc functions access dw-hdmi's current connector pointer instead, which is assigned during the bridge enablement stage. [narmstrong: moved Fixes tag before first S-o-b and added Reported-by tag] Added Reference https://git.kernel.org/stable/c/552f79aa9e801ed4f74d6b3221af78042ba4f235 Added Reference https://git.kernel.org/stable/c/98703e4e061fb8715c7613cd227e32cdfd136b23