CVE-2022-50499

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.

• linux linux kernel (>= 4.9.195 < 4.9.337) • linux linux kernel (>= 4.14.147 < 4.14.303) • linux linux kernel (>= 4.19.77 < 4.19.270) • linux linux kernel (>= 5.2.19 < 5.3) • linux linux kernel (>= 5.3.4 < 5.4.229) • linux linux kernel (>= 5.5 < 5.10.163) • linux linux kernel (>= 5.11 < 5.15.87) • linux linux kernel (>= 5.16 < 6.0.18) • linux linux kernel (>= 6.1 < 6.1.4)