Linux Kernel up to 6.14.8 virtio device_shutdown information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.14.8. It has been declared as problematic. This affects the function device_shutdown of the component virtio. Executing a manipulation can lead to information disclosure. This vulnerability is tracked as CVE-2025-38064. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.14.8. It has been declared as problematic. This vulnerability affects the function device_shutdown of the component virtio. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: virtio: break and reset virtio devices on device_shutdown() Hongyu reported a hang on kexec in a VM. QEMU reported invalid memory accesses during the hang. Invalid read at addr 0x102877002, size 2, region '(null)', reason: rejected Invalid write at addr 0x102877A44, size 2, region '(null)', reason: rejected ... It was traced down to virtio-console. Kexec works fine if virtio-console is not in use. The issue is that virtio-console continues to write to the MMIO even after underlying virtio-pci device is reset. Additionally, Eric noticed that IOMMUs are reset before devices, if devices are not reset on shutdown they continue to poke at guest memory and get errors from the IOMMU. Some devices get wedged then. The problem can be solved by breaking all virtio devices on virtio bus shutdown, then resetting them.

The weakness was disclosed by shutdown. The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-38064 since 04/16/2025. The exploitation appears to be difficult. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 243200 (Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-084)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.14.9 eliminates this vulnerability. Applying the patch aee42f3d57bfa37b2716df4584edeecf63b9df4c/8bd2fa086a04886798b505f28db4002525895203 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 (243200) and CERT Bund (WID-SEC-2025-1350). Once again VulDB remains the best source for vulnerability data.

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

• 6.14.0
• 6.14.1
• 6.14.2
• 6.14.3
• 6.14.4
• 6.14.5
• 6.14.6
• 6.14.7
• 6.14.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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