CVE-2022-50274
N/A
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ac521bbe3d00fa574e66a9361763f2b37725bc97 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 219b44bf94203bd433aa91b7796475bf656348e5 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2abd73433872194bccdf1432a0980e4ec5273c2a | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 88a6f8a72d167294c0931c7874941bf37a41b6dd | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a2f0a08aa613176c9688c81d7b598a7779974991 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9945d05d6693710574f354c5dbddc47f5101eb77 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79 | affected |
| Linux | Linux | 2.6.12 | affected |
| Linux | Linux | 0 < 2.6.12 | unaffected |
| Linux | Linux | 4.14.303 <= 4.14.* | unaffected |
| Linux | Linux | 4.19.270 <= 4.19.* | unaffected |
| Linux | Linux | 5.4.229 <= 5.4.* | unaffected |
| Linux | Linux | 5.10.163 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.86 <= 5.15.* | unaffected |
| Linux | Linux | 6.0.16 <= 6.0.* | unaffected |
| Linux | Linux | 6.1.2 <= 6.1.* | unaffected |
| Linux | Linux | 6.2 <= * | unaffected |
Weaknesses
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
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