Detections
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CVE-2022-50274
critical
Description
In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: adopts refcnt to avoid UAF dvb_unregister_device() is known that prone to use-after-free. That is, the cleanup from dvb_unregister_device() releases the dvb_device even if there are pointers stored in file->private_data still refer to it. This patch adds a reference counter into struct dvb_device and delays its deallocation until no pointer refers to the object.
References
https://git.kernel.org/stable/c/ac521bbe3d00fa574e66a9361763f2b37725bc97
https://git.kernel.org/stable/c/a2f0a08aa613176c9688c81d7b598a7779974991
https://git.kernel.org/stable/c/9945d05d6693710574f354c5dbddc47f5101eb77
https://git.kernel.org/stable/c/88a6f8a72d167294c0931c7874941bf37a41b6dd
https://git.kernel.org/stable/c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2a
https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5
https://git.kernel.org/stable/c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79