Linux Kernel up to 6.14.7 io_uring_show_fdinfo information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.14.7. It has been classified as problematic. Impacted is the function io_uring_show_fdinfo. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-2025-38002. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.14.7. This affects the function io_uring_show_fdinfo. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo() Not everything requires locking in there, which is why the 'has_lock' variable exists. But enough does that it's a bit unwieldy to manage. Wrap the whole thing in a ->uring_lock trylock, and just return with no output if we fail to grab it. The existing trylock() will already have greatly diminished utility/output for the failure case. This fixes an issue with reading the SQE fields, if the ring is being actively resized at the same time.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-38002 since 04/16/2025. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 258130 (Ubuntu 25.04 : Linux kernel (Azure) vulnerabilities (USN-7721-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.14.8 eliminates this vulnerability. Applying the patch bdb7d2ec2e31c46c45d1f32667dfa8216a72705e/d871198ee431d90f5308d53998c1ba1d5db5619a 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 (258130) and CERT Bund (WID-SEC-2025-1270). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Dell Avamar
• Open Source Linux Kernel
• Dell NetWorker
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.14.0
• 6.14.1
• 6.14.2
• 6.14.3
• 6.14.4
• 6.14.5
• 6.14.6
• 6.14.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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