FKIE_CVE-2026-53058

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: cadence: cdns-mhdp8546-core: Set the mhdp connector earlier in atomic_enable() In case if we get errors in cdns_mhdp_link_up() or cdns_mhdp_reg_read() in atomic_enable, we will go to cdns_mhdp_modeset_retry_fn() and will hit NULL pointer while trying to access the mutex. We need the connector to be set before that. Unlike in legacy cases with flag !DRM_BRIDGE_ATTACH_NO_CONNECTOR, we do not have connector initialised in bridge_attach(), so add the mhdp->connector_ptr in device structure to handle both cases with DRM_BRIDGE_ATTACH_NO_CONNECTOR and !DRM_BRIDGE_ATTACH_NO_CONNECTOR, set it in atomic_enable() earlier to avoid possible NULL pointer dereference in recovery paths like modeset_retry_fn() with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1af3b42e08a957e53bab8e1897393fe0a27d9fbf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43d6508ddbf9fb974fbc359a033154f78c9d4c8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5302015daf26ef6b48e067f2b86c9482ac19e015
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3611554e599d1a24b45fd8415bacb72ce861e4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c",
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h",
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5302015daf26ef6b48e067f2b86c9482ac19e015",
              "status": "affected",
              "version": "c932ced6b58524eeb948ff252f6512cd6bcb9d9f",
              "versionType": "git"
            },
            {
              "lessThan": "a3611554e599d1a24b45fd8415bacb72ce861e4b",
              "status": "affected",
              "version": "c932ced6b58524eeb948ff252f6512cd6bcb9d9f",
              "versionType": "git"
            },
            {
              "lessThan": "cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575",
              "status": "affected",
              "version": "c932ced6b58524eeb948ff252f6512cd6bcb9d9f",
              "versionType": "git"
            },
            {
              "lessThan": "1af3b42e08a957e53bab8e1897393fe0a27d9fbf",
              "status": "affected",
              "version": "c932ced6b58524eeb948ff252f6512cd6bcb9d9f",
              "versionType": "git"
            },
            {
              "lessThan": "43d6508ddbf9fb974fbc359a033154f78c9d4c8b",
              "status": "affected",
              "version": "c932ced6b58524eeb948ff252f6512cd6bcb9d9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c",
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h",
            "drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: cadence: cdns-mhdp8546-core: Set the mhdp connector earlier in atomic_enable()\n\nIn case if we get errors in cdns_mhdp_link_up() or cdns_mhdp_reg_read()\nin atomic_enable, we will go to cdns_mhdp_modeset_retry_fn() and will hit\nNULL pointer while trying to access the mutex. We need the connector to\nbe set before that. Unlike in legacy cases with flag\n!DRM_BRIDGE_ATTACH_NO_CONNECTOR, we do not have connector initialised\nin bridge_attach(), so add the mhdp-\u003econnector_ptr in device structure\nto handle both cases with DRM_BRIDGE_ATTACH_NO_CONNECTOR and\n!DRM_BRIDGE_ATTACH_NO_CONNECTOR, set it in atomic_enable() earlier to\navoid possible NULL pointer dereference in recovery paths like\nmodeset_retry_fn() with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set."
    }
  ],
  "id": "CVE-2026-53058",
  "lastModified": "2026-06-24T17:17:18.170",
  "metrics": {},
  "published": "2026-06-24T17:17:18.170",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1af3b42e08a957e53bab8e1897393fe0a27d9fbf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/43d6508ddbf9fb974fbc359a033154f78c9d4c8b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5302015daf26ef6b48e067f2b86c9482ac19e015"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3611554e599d1a24b45fd8415bacb72ce861e4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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