CVE-2022-50499 (GCVE-0-2022-50499)
Vulnerability from cvelistv5
Published
2025-10-04 15:43
Modified
2025-10-04 15:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: dvb-core: Fix double free in dvb_register_device() In function dvb_register_device() -> dvb_register_media_device() -> dvb_create_media_entity(), dvb->entity is allocated and initialized. If the initialization fails, it frees the dvb->entity, and return an error code. The caller takes the error code and handles the error by calling dvb_media_device_free(), which unregisters the entity and frees the field again if it is not NULL. As dvb->entity may not NULLed in dvb_create_media_entity() when the allocation of dvbdev->pad fails, a double free may occur. This may also cause an Use After free in media_device_unregister_entity(). Fix this by storing NULL to dvb->entity when it is freed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9db28659aa893c68f162b11fd63bb7f6a713e52f
Version: 1399a136127bfe1b9bb7c951d9851da62a519121
Version: 4df2427a5148093987437054bb82da4d014dcd59
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: fcd5ce4b3936242e6679875a4d3c3acfc8743e15
Version: 8c17f6f5d0d6aab72a2af25c9911ac66e984be06
Version: 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-core: Fix double free in dvb_register_device()\n\nIn function dvb_register_device() -\u003e dvb_register_media_device() -\u003e\ndvb_create_media_entity(), dvb-\u003eentity is allocated and initialized. If\nthe initialization fails, it frees the dvb-\u003eentity, and return an error\ncode. The caller takes the error code and handles the error by calling\ndvb_media_device_free(), which unregisters the entity and frees the\nfield again if it is not NULL. As dvb-\u003eentity may not NULLed in\ndvb_create_media_entity() when the allocation of dvbdev-\u003epad fails, a\ndouble free may occur. This may also cause an Use After free in\nmedia_device_unregister_entity().\n\nFix this by storing NULL to dvb-\u003eentity when it is freed."
        }
      ],
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        "dateUpdated": "2025-10-04T15:43:50.064Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50499",
    "datePublished": "2025-10-04T15:43:50.064Z",
    "dateReserved": "2025-10-04T15:39:19.464Z",
    "dateUpdated": "2025-10-04T15:43:50.064Z",
    "state": "PUBLISHED"
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  }
}


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