Linux Kernel up to 5.18.5 of_parse_phandle null pointer dereference

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.18.5. The impacted element is the function of_parse_phandle. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2022-49712. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.18.5. It has been declared as critical. This vulnerability affects the function of_parse_phandle. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: lpc32xx_udc: Fix refcount leak in lpc32xx_udc_probe of_parse_phandle() returns a 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. of_node_put() will check NULL pointer.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-49712 since 02/26/2025. There are known technical details, but no exploit is available.

Upgrading to version 4.9.320, 4.14.285, 4.19.249, 5.4.200, 5.10.124, 5.15.49 or 5.18.6 eliminates this vulnerability. Applying the patch d85e4e6284a91aa2d1ab004e9d84b9c09b4aa203/0ef6917c0524da5b88496b9706628ffef108b9bb/2a598da14856ead80c726b38ba426c68637d9211/b75bddfcc18170ce8e3fb695a76ec2dec4ce0ea5/57901c658f77d9ea2e772f35cb38e47efb54c558/46da1e4a8b6329479433b2a4056941dfdd7f3efd/727c82d003e0ec64411fd1257a9a57de4ad7a99a/4757c9ade34178b351580133771f510b5ffcf9c8 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

• 4.9.319
• 4.14.284
• 4.19.248
• 5.4.199
• 5.10.123
• 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
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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