vulnerability
Red Hat: CVE-2022-50274: kernel: media: dvbdev: adopts refcnt to avoid UAF (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:M/Au:M/C:P/I:C/A:C) | Sep 15, 2025 | Nov 14, 2025 | Dec 4, 2025 |
Severity
6
CVSS
(AV:L/AC:M/Au:M/C:P/I:C/A:C)
Published
Sep 15, 2025
Added
Nov 14, 2025
Modified
Dec 4, 2025
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.
Solution
redhat-upgrade-kernel
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