CVE-2022-50274
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50274
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50274.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50274
- Downstream
- Published
- 2025-09-15T15:15:38Z
- Modified
- 2025-09-15T20:01:26Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
media: dvbdev: adopts refcnt to avoid UAF
dvbunregisterdevice() is known that prone to use-after-free. That is, the cleanup from dvbunregisterdevice() releases the dvbdevice even if there are pointers stored in file->privatedata 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/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79
- https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5
- https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2a
- https://git.kernel.org/stable/c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2
- https://git.kernel.org/stable/c/88a6f8a72d167294c0931c7874941bf37a41b6dd
- https://git.kernel.org/stable/c/9945d05d6693710574f354c5dbddc47f5101eb77
- https://git.kernel.org/stable/c/a2f0a08aa613176c9688c81d7b598a7779974991
- https://git.kernel.org/stable/c/ac521bbe3d00fa574e66a9361763f2b37725bc97