CVE-2022-50499

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: dvb-core: Fix double free in dvb_register_device()<br /> <br /> In function dvb_register_device() -&gt; dvb_register_media_device() -&gt;<br /> dvb_create_media_entity(), dvb-&gt;entity is allocated and initialized. If<br /> the initialization fails, it frees the dvb-&gt;entity, and return an error<br /> code. The caller takes the error code and handles the error by calling<br /> dvb_media_device_free(), which unregisters the entity and frees the<br /> field again if it is not NULL. As dvb-&gt;entity may not NULLed in<br /> dvb_create_media_entity() when the allocation of dvbdev-&gt;pad fails, a<br /> double free may occur. This may also cause an Use After free in<br /> media_device_unregister_entity().<br /> <br /> Fix this by storing NULL to dvb-&gt;entity when it is freed.