CVE-2022-50274

Vulnerability overview

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.

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ac521bbe3d00fa574e66a9361763f2b37725bc97, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 219b44bf94203bd433aa91b7796475bf656348e5, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2abd73433872194bccdf1432a0980e4ec5273c2a, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 88a6f8a72d167294c0931c7874941bf37a41b6dd, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a2f0a08aa613176c9688c81d7b598a7779974991, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9945d05d6693710574f354c5dbddc47f5101eb77, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79, >= 2.6.12, < 4.14.303, >= 4.15 < 4.19.270, >= 4.20 < 5.4.229, >= 5.5 < 5.10.163, >= 5.11 < 5.15.86, >= 5.16 < 6.0.16, >= 6.1 < 6.1.2

Fixed versions

4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416