IT

Tracker / CVE-2022-50499

CVE-2022-50499

High 7.8

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.

Affected products and versions

linux linux_kernel · 4.14.147 → 4.14.303
linux linux_kernel · 4.19.77 → 4.19.270
linux linux_kernel · 4.9.195 → 4.9.337
linux linux_kernel · 5.11 → 5.15.87
linux linux_kernel · 5.16 → 6.0.18
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 · 6.1 → 6.1.4

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References