Linux Kernel up to 5.4.201/5.10.126/5.15.50/5.18.7 of_graph_get_remote_node reference count

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.4.201/5.10.126/5.15.50/5.18.7. It has been classified as critical. This affects the function of_graph_get_remote_node. The manipulation leads to reference count. This vulnerability is traded as CVE-2022-49693. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.4.201/5.10.126/5.15.50/5.18.7 and classified as critical. This issue affects the function of_graph_get_remote_node. The manipulation with an unknown input leads to a reference count vulnerability. Using CWE to declare the problem leads to CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/msm/mdp4: Fix refcount leak in mdp4_modeset_init_intf of_graph_get_remote_node() returns remote device node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak. Patchwork: https://patchwork.freedesktop.org/patch/488473/

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2022-49693 since 02/26/2025. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 226441 (Linux Distros Unpatched Vulnerability : CVE-2022-49693), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.202, 5.10.127, 5.15.51 or 5.18.8 eliminates this vulnerability. Applying the patch d1592d3e362cc59b29f15019707b16c695d70ca3/d16a4339825e64f9ddcdff5277982d640bae933b/3c39a17197733bc37786ed68c83267c2f491840b/d607da76fd2b1cf1d377af9d9b7c6f8fecbb0e1d/b9cc4598607cb7f7eae5c75fc1e3209cd52ff5e0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (226441). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.201
• 5.10.126
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion