drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr
The function mtk_dp_wait_hpd_asserted() may be called before the
`mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach().
Specifically it can be called via this callpath:
- mtk_edp_wait_hpd_asserted
- [panel probe]
- dp_aux_ep_probe
Using "drm" level prints anywhere in this callpath causes a NULL
pointer dereference. Change the error message directly in
mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the
error messages in mtk_dp_parse_capabilities(), which is called by
mtk_dp_wait_hpd_asserted().
While touching these prints, also add the error code to them to make
future debugging easier.
Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-11824 | In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted(). While touching these prints, also add the error code to them to make future debugging easier. |
Ubuntu USN |
USN-7594-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7594-2 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7594-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7605-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7605-2 | Linux kernel (Low Latency) vulnerabilities |
Ubuntu USN |
USN-7606-1 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-7628-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7835-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7835-2 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-7835-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7835-4 | Linux kernel (HWE) vulnerabilities |
Ubuntu USN |
USN-7835-5 | Linux kernel (Oracle) vulnerabilities |
Ubuntu USN |
USN-7835-6 | Linux kernel (AWS) vulnerabilities |
Ubuntu USN |
USN-7887-1 | Linux kernel (Raspberry Pi Real-time) vulnerabilities |
Ubuntu USN |
USN-7887-2 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7940-1 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7940-2 | Linux kernel (Azure, N-Series) vulnerabilities |
Thu, 06 Nov 2025 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-476 | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Sat, 19 Apr 2025 02:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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| Metrics |
threat_severity
|
cvssV3_1
|
Fri, 18 Apr 2025 07:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted(). While touching these prints, also add the error code to them to make future debugging easier. | |
| Title | drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr | |
| References |
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|
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-05-11T21:23:56.828Z
Reserved: 2025-04-16T04:51:23.996Z
Link: CVE-2025-38240
No data.
Status : Analyzed
Published: 2025-04-18T07:15:43.510
Modified: 2025-11-06T16:22:49.323
Link: CVE-2025-38240
OpenCVE Enrichment
Updated: 2025-06-24T09:44:22Z
EUVD
Ubuntu USN