Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.19.6/7.0-rc2. Affected is the function sev_tsm_init_locked of the component crypto. The manipulation results in use after free. This vulnerability was named CVE-2026-23344. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.6/7.0-rc2. Affected is the function sev_tsm_init_locked of the component crypto. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix use-after-free on error path In the error path of sev_tsm_init_locked(), the code dereferences 't' after it has been freed with kfree(). The pr_err() statement attempts to access t->tio_en and t->tio_init_done after the memory has been released. Move the pr_err() call before kfree(t) to access the fields while the memory is still valid. This issue reported by Smatch static analyser

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-23344 since 01/13/2026. The exploitability is told to be easy. 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 03/30/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304106 (Linux Distros Unpatched Vulnerability : CVE-2026-23344), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 79a26fe3175b9ed7c0c9541b197cb9786237c0f7/889b0e2721e793eb46cf7d17b965aa3252af3ec8 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 vulnerability database at Tenable (304106). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5
• 6.19.6
• 7.0-rc1
• 7.0-rc2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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