CVE-2022-50745
Unknown Unknown - Not Provided

Use-After-Free Vulnerability in Linux Tegra Video Driver

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: staging: media: tegra-video: fix device_node use after free At probe time this code path is followed: * tegra_csi_init * tegra_csi_channels_alloc * for_each_child_of_node(node, channel) -- iterates over channels * automatically gets 'channel' * tegra_csi_channel_alloc() * saves into chan->of_node a pointer to the channel OF node * automatically gets and puts 'channel' * now the node saved in chan->of_node has refcount 0, can disappear * tegra_csi_channels_init * iterates over channels * tegra_csi_channel_init -- uses chan->of_node After that, chan->of_node keeps storing the node until the device is removed. of_node_get() the node and of_node_put() it during teardown to avoid any risk.

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Meta Information

Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-07-06
AI Q&A
2025-12-24
EPSS Evaluated
2026-07-05
NVD
CVE-2022-50745
EUVD
EUVD-2022-55816

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
nvidia tegra_video *
linux linux_kernel *
linux kernel *

Helpful Resources

Exploitability

CWE
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's tegra-video media staging driver. During device initialization, a pointer to a device tree node (of_node) is saved without properly increasing its reference count, which can lead to the node being freed while still in use. This can cause the driver to access freed memory, potentially leading to instability or crashes. The fix involves properly managing the reference count by calling of_node_get() when saving the node and of_node_put() during teardown to prevent the node from being freed prematurely.

Impact Analysis

This vulnerability can lead to use-after-free conditions in the tegra-video driver, which may cause system instability, crashes, or unexpected behavior when the device is initialized or removed. In some cases, such memory errors could be exploited to cause denial of service or potentially escalate privileges, depending on the system context.

Mitigation Strategies

The vulnerability is fixed by ensuring proper reference counting of device tree nodes in the tegra-video driver. To mitigate this vulnerability, update your Linux kernel to a version that includes the fix for the 'staging: media: tegra-video: fix device_node use after free' issue. This fix involves calling of_node_get() and of_node_put() appropriately during device initialization and teardown to avoid use-after-free conditions.

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