GHSA-2627-H6Q4-H8XQ
Vulnerability from github – Published: 2025-04-18 15:31 – Updated: 2025-11-06 18:32In 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.
{
"affected": [],
"aliases": [
"CVE-2025-38240"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-18T07:15:43Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: dp: drm_err =\u003e dev_err in HPD path to avoid NULL ptr\n\nThe function mtk_dp_wait_hpd_asserted() may be called before the\n`mtk_dp-\u003edrm_dev` pointer is assigned in mtk_dp_bridge_attach().\nSpecifically it can be called via this callpath:\n - mtk_edp_wait_hpd_asserted\n - [panel probe]\n - dp_aux_ep_probe\n\nUsing \"drm\" level prints anywhere in this callpath causes a NULL\npointer dereference. Change the error message directly in\nmtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the\nerror messages in mtk_dp_parse_capabilities(), which is called by\nmtk_dp_wait_hpd_asserted().\n\nWhile touching these prints, also add the error code to them to make\nfuture debugging easier.",
"id": "GHSA-2627-h6q4-h8xq",
"modified": "2025-11-06T18:32:43Z",
"published": "2025-04-18T15:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38240"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/149a5c38436c229950cf1020992ce65c9549bc19"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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