Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ac521bbe3d00fa574e66a9361763f2b37725bc97; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 219b44bf94203bd433aa91b7796475bf656348e5; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2abd73433872194bccdf1432a0980e4ec5273c2a; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 88a6f8a72d167294c0931c7874941bf37a41b6dd; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a2f0a08aa613176c9688c81d7b598a7779974991; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9945d05d6693710574f354c5dbddc47f5101eb77; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.14.303 through 4.14.*; unaffected 4.19.270 through 4.19.*; unaffected 5.4.229 through 5.4.*; unaffected 5.10.163 through 5.10.*; unaffected 5.15.86 through 5.15.*; unaffected 6.0.16 through 6.0.*; unaffected 6.1.2 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ac521bbe3d00fa574e66a9361763f2b37725bc97
- https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5
- https://git.kernel.org/stable/c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
- https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2a
- https://git.kernel.org/stable/c/88a6f8a72d167294c0931c7874941bf37a41b6dd
- https://git.kernel.org/stable/c/a2f0a08aa613176c9688c81d7b598a7779974991
- https://git.kernel.org/stable/c/9945d05d6693710574f354c5dbddc47f5101eb77
- https://git.kernel.org/stable/c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79