Linux Kernel up to 5.19.9 peci lib/refcount.c adev_release use after free

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.19.9. The impacted element is the function adev_release in the library lib/refcount.c of the component peci. Executing a manipulation can lead to use after free. The identification of this vulnerability is CVE-2022-48670. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.19.9 and classified as critical. This vulnerability affects the function adev_release in the library lib/refcount.c of the component peci. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, and integrity. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: peci: cpu: Fix use-after-free in adev_release() When auxiliary_device_add() returns an error, auxiliary_device_uninit() is called, which causes refcount for device to be decremented and .release callback will be triggered. Because adev_release() re-calls auxiliary_device_uninit(), it will cause use-after-free: [ 1269.455172] WARNING: CPU: 0 PID: 14267 at lib/refcount.c:28 refcount_warn_saturate+0x110/0x15 [ 1269.464007] refcount_t: underflow; use-after-free.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-48670 since 02/25/2024. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/29/2025).

The vulnerability scanner Nessus provides a plugin with the ID 247398 (Linux Distros Unpatched Vulnerability : CVE-2022-48670), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.19.10 or 6.0 eliminates this vulnerability. Applying the patch c87f1f99e26e/1c11289b34ab 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 databases at Tenable (247398) and CERT Bund (WID-SEC-2024-1025). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• EMC Avamar
• Broadcom Brocade SANnav
• Dell NetWorker
• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.19.0
• 5.19.1
• 5.19.2
• 5.19.3
• 5.19.4
• 5.19.5
• 5.19.6
• 5.19.7
• 5.19.8
• 5.19.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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