CVE-2025-38240 (GCVE-0-2025-38240)

Vulnerability from cvelistv5 – Published: 2025-04-18 07:01 – Updated: 2025-05-26 05:25
VLAI?
Title
drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7eacba9a083be65c0f251c19380ec01147c01ebc , < 13ec849fd2eab808ee8eba2625df7ebea3b85edf (git)
Affected: 7eacba9a083be65c0f251c19380ec01147c01ebc , < 57a9fb47551b33cde7b76d17c0072c3b394f4620 (git)
Affected: 7eacba9a083be65c0f251c19380ec01147c01ebc , < 2fda391ef7a701748abd7fa32232981b522c1e07 (git)
Affected: 7eacba9a083be65c0f251c19380ec01147c01ebc , < 149a5c38436c229950cf1020992ce65c9549bc19 (git)
Affected: 7eacba9a083be65c0f251c19380ec01147c01ebc , < 106a6de46cf4887d535018185ec528ce822d6d84 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.87 , ≤ 6.6.* (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/mediatek/mtk_dp.c"
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          "programFiles": [
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          "vendor": "Linux",
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              "version": "6.6"
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
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              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.87",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
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                },
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:25:21.005Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf"
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        {
          "url": "https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620"
        },
        {
          "url": "https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07"
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        },
        {
          "url": "https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84"
        }
      ],
      "title": "drm/mediatek: dp: drm_err =\u003e dev_err in HPD path to avoid NULL ptr",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38240",
    "datePublished": "2025-04-18T07:01:32.338Z",
    "dateReserved": "2025-04-16T04:51:23.996Z",
    "dateUpdated": "2025-05-26T05:25:21.005Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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