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CVE-2022-50274

media: dvbdev: adopts refcnt to avoid UAF

Published: Sep 15, 2025Updated: Dec 3, 2025 Sources: CVE List NVD BDUCWE-416
NVD MITRE
7.8CVSSHIGH
EPSS Score
0.1%
Top 95.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

linux kernellinux
On-premOS
Operating Systems
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Red Hat VirtualizationRed Hat Inc.
On-prem
Cloud & SaaS / virtualization
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
linuxoss-projectOperating Systemsaka the linux kernel
red hat inc.commercialUSOperating Systemsaka red hat
canonical ltd.commercialGBOperating Systemsaka canonical
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://git.kernel.org/stable/c/0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79
git.kernel.org
https://git.kernel.org/stable/c/219b44bf94203bd433aa91b7796475bf656348e5
git.kernel.org
https://git.kernel.org/stable/c/2abd73433872194bccdf1432a0980e4ec5273c2a
git.kernel.org
and 24 more references View all →

Timeline

Published
Sep 15, 2025
Last Updated
Dec 3, 2025

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