Linux Kernel up to 5.18.3 ts4800_wdt_probe of_parse_phandle reference count

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 5.4.197/5.10.121/5.15.46/5.17.14/5.18.3. The impacted element is the function of_parse_phandle of the component ts4800_wdt_probe. This manipulation causes reference count. This vulnerability is tracked as CVE-2022-49373. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.4.197/5.10.121/5.15.46/5.17.14/5.18.3. It has been declared as problematic. Affected by this vulnerability is the function of_parse_phandle of the component ts4800_wdt_probe. The manipulation with an unknown input leads to a reference count vulnerability. The CWE definition for the vulnerability is CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: watchdog: ts4800_wdt: Fix refcount leak in ts4800_wdt_probe of_parse_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. Add missing of_node_put() in some error paths.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-49373 since 02/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.4.198, 5.10.122, 5.15.47, 5.17.15 or 5.18.4 eliminates this vulnerability. Applying the patch 5b110d940417942bc87d9e4bea6d4f24e05ed483/910b1cdf6c50ae8fb222e46657d04fb181577017/7a4afd8a003d6abf1f5d159c2bb67e6b7cbde253/91fa5aa53f68b85e779164b3127c7e23cad5c457/f067b5286edfd83d2d3903e8578b561599d62539/5d24df3d690809952528e7a19a43d84bc5b99d44 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.197
• 5.10.121
• 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
• 5.17.0
• 5.17.1
• 5.17.2
• 5.17.3
• 5.17.4
• 5.17.5
• 5.17.6
• 5.17.7
• 5.17.8
• 5.17.9
• 5.17.10
• 5.17.11
• 5.17.12
• 5.17.13
• 5.17.14
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

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Exploitinginfo

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Entryinfo

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