Linux Kernel up to 6.12.20/6.13.8 huge_memory privilege escalation

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.20/6.13.8. It has been declared as problematic. This issue affects some unknown processing of the component huge_memory. The manipulation results in an unknown weakness. This vulnerability is known as CVE-2025-22000. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.12.20/6.13.8. Affected is some unknown processing of the component huge_memory. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: drop beyond-EOF folios with the right number of refs When an after-split folio is large and needs to be dropped due to EOF, folio_put_refs(folio, folio_nr_pages(folio)) should be used to drop all page cache refs. Otherwise, the folio will not be freed, causing memory leak. This leak would happen on a filesystem with blocksize > page_size and a truncate is performed, where the blocksize makes folios split to >0 order ones, causing truncated folios not being freed.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-22000 since 12/29/2024. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 241070 (Ubuntu 24.04 LTS : Linux kernel (OEM) vulnerabilities (USN-7606-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.21 or 6.13.9 eliminates this vulnerability. Applying the patch 86368616a9ce51f6b41efa251b6e066893851d67/92ad820a1f2d95d5a8d6c2bd3f391bbb068a5f9e/14efb4793519d73fb2902bb0ece319b886e4b4b9 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 (241070) and CERT Bund (WID-SEC-2025-0698). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• SolarWinds Security Event Manager
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5
• 6.12.6
• 6.12.7
• 6.12.8
• 6.12.9
• 6.12.10
• 6.12.11
• 6.12.12
• 6.12.13
• 6.12.14
• 6.12.15
• 6.12.16
• 6.12.17
• 6.12.18
• 6.12.19
• 6.12.20
• 6.13.0
• 6.13.1
• 6.13.2
• 6.13.3
• 6.13.4
• 6.13.5
• 6.13.6
• 6.13.7
• 6.13.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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