Linux Kernel up to 5.18.12 pmac_cpufreq_init_MacRISC3 reference count

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.18.12. This issue affects the function pmac_cpufreq_init_MacRISC3. Executing a manipulation can lead to reference count. This vulnerability is handled as CVE-2022-49621. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.18.12. This vulnerability affects the function pmac_cpufreq_init_MacRISC3. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: cpufreq: pmac32-cpufreq: Fix refcount leak bug In pmac_cpufreq_init_MacRISC3(), we need to add corresponding of_node_put() for the three node pointers whose refcount have been incremented by of_find_node_by_name().

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-49621 since 02/26/2025. There are known technical details, but no exploit is available.

Upgrading to version 4.9.324, 4.14.289, 4.19.253, 5.4.207, 5.10.132, 5.15.56 or 5.18.13 eliminates this vulnerability. Applying the patch 4f242486bf46d314b2e3838cc64b56f008a3c4d7/37c16fc2cb13a13f3c0193bfc6f2edef7d7df7d7/4585890ab2dbf455d80e254d3d859d4c1e357920/8dda30f81c751b01cd71f2cfaeef26ad4393b1d1/3ea9dbf7c2f436952bca331c6f5d72f75aca224e/57289b6601fe78c09921599b042a0b430fb420ec/4513018d0bd739097570d26a7760551cba3deb56/ccd7567d4b6cf187fdfa55f003a9e461ee629e36 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

• 4.9.323
• 4.14.288
• 4.19.252
• 5.4.206
• 5.10.131
• 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
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7
• 5.18.8
• 5.18.9
• 5.18.10
• 5.18.11
• 5.18.12

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

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