CVE-2022-50274
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.16% probability · 5th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79Patch
- https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5Patch
- https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2aPatch
- https://git.kernel.org/stable/c/6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2Patch
- https://git.kernel.org/stable/c/88a6f8a72d167294c0931c7874941bf37a41b6ddPatch
- https://git.kernel.org/stable/c/9945d05d6693710574f354c5dbddc47f5101eb77Patch
- https://git.kernel.org/stable/c/a2f0a08aa613176c9688c81d7b598a7779974991Patch
- https://git.kernel.org/stable/c/ac521bbe3d00fa574e66a9361763f2b37725bc97Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.