Linux Kernel up to 5.15.11 dbgfs dbgfs_target_ids_read information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 5.15.11. This affects the function dbgfs_target_ids_read of the component dbgfs. Such manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2021-47088. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.15.11 (Operating System). Affected by this issue is the function dbgfs_target_ids_read of the component dbgfs. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: protect targets destructions with kdamond_lock DAMON debugfs interface iterates current monitoring targets in 'dbgfs_target_ids_read()' while holding the corresponding 'kdamond_lock'. However, it also destructs the monitoring targets in 'dbgfs_before_terminate()' without holding the lock. This can result in a use_after_free bug. This commit avoids the race by protecting the destruction with the corresponding 'kdamond_lock'.

The weakness was disclosed 03/04/2024. The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2021-47088 since 02/29/2024. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 5.15.12 or 5.16 eliminates this vulnerability. Applying the patch 330c6117a82c/34796417964b 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

• 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

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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