CVE-2021-47063
Vulnerability from cvelistv5
Published
2024-02-29 22:37
Modified
2024-11-04 11:58
Severity ?
Summary
drm: bridge/panel: Cleanup connector on bridge detach
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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                "id": "CVE-2021-47063",
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                "timestamp": "2024-03-01T15:52:26.504965Z",
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/panel.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: bridge/panel: Cleanup connector on bridge detach\n\nIf we don\u0027t call drm_connector_cleanup() manually in\npanel_bridge_detach(), the connector will be cleaned up with the other\nDRM objects in the call to drm_mode_config_cleanup(). However, since our\ndrm_connector is devm-allocated, by the time drm_mode_config_cleanup()\nwill be called, our connector will be long gone. Therefore, the\nconnector must be cleaned up when the bridge is detached to avoid\nuse-after-free conditions.\n\nv2: Cleanup connector only if it was created\n\nv3: Add FIXME\n\nv4: (Use connector-\u003edev) directly in if() block"
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      "title": "drm: bridge/panel: Cleanup connector on bridge detach",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47063",
    "datePublished": "2024-02-29T22:37:37.429Z",
    "dateReserved": "2024-02-29T22:33:44.294Z",
    "dateUpdated": "2024-11-04T11:58:43.052Z",
    "state": "PUBLISHED"
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  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47063\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-29T23:15:07.893\",\"lastModified\":\"2024-03-01T14:04:26.010\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm: bridge/panel: Cleanup connector on bridge detach\\n\\nIf we don\u0027t call drm_connector_cleanup() manually in\\npanel_bridge_detach(), the connector will be cleaned up with the other\\nDRM objects in the call to drm_mode_config_cleanup(). However, since our\\ndrm_connector is devm-allocated, by the time drm_mode_config_cleanup()\\nwill be called, our connector will be long gone. Therefore, the\\nconnector must be cleaned up when the bridge is detached to avoid\\nuse-after-free conditions.\\n\\nv2: Cleanup connector only if it was created\\n\\nv3: Add FIXME\\n\\nv4: (Use connector-\u003edev) directly in if() block\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm: bridge/panel: Limpiar conector en bridge detach Si no llamamos a drm_connector_cleanup() manualmente en panel_bridge_detach(), el conector se limpiar\u00e1 con los dem\u00e1s objetos DRM en la llamada a drm_mode_config_cleanup(). Sin embargo, dado que nuestro drm_connector est\u00e1 asignado por devm, para cuando se llame a drm_mode_config_cleanup(), nuestro conector ya no existir\u00e1. Por lo tanto, el conector debe limpiarse cuando se retira el puente para evitar condiciones de uso despu\u00e9s de su liberaci\u00f3n. v2: Limpiar el conector solo si fue creado v3: Agregar FIXME v4: (Usar conector-\u0026gt;dev) directamente en el bloque if()\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/18149b420c9bd93c443e8d1f48a063d71d9f6aa1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4d906839d321c2efbf3fed4bc31ffd9ff55b75c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/98d7d76a74e48ec3ddf2e23950adff7edcab9327\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ce450934a00cf896e648fde08d0bd1426653d7a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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