Linux Kernel up to 5.18.17/5.19.1 cifs readahead_folio memory leak

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.18.17/5.19.1 and classified as critical. Affected is the function readahead_folio of the component cifs. Executing a manipulation can lead to memory leak. The identification of this vulnerability is CVE-2022-50107. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 5.18.17/5.19.1 and classified as critical. This vulnerability affects the function readahead_folio of the component cifs. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak when using fscache If we hit the 'index == next_cached' case, we leak a refcount on the struct page. Fix this by using readahead_folio() which takes care of the refcount for you.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2022-50107 since 06/18/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 249902 (Linux Distros Unpatched Vulnerability : CVE-2022-50107), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.18.18 or 5.19.2 eliminates this vulnerability. Applying the patch 7105b4047481bc2950fb767cff328d8b75292c0f/ae497726cd090673a4d20ac725ccc2de8067a7a5/c6f62f81b488d00afaa86bae26c6ce9ab12c709e 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 (249902) and CERT Bund (WID-SEC-2025-1350). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source Linux Kernel
• RESF Rocky Linux
• Dell Avamar
• Dell NetWorker
• Dell Secure Connect Gateway
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 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
• 5.18.13
• 5.18.14
• 5.18.15
• 5.18.16
• 5.18.17
• 5.19.0
• 5.19.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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