Vulnerability/
REDHAT-BUG-2440934

REDHAT-BUG-2440934

Published Feb 19, 2026

Updated

A heap buffer over-read was found in block/vmdk.c. A crafted VMDK file can make qemu-img (or qemu with vmdk disk) read past an allocated buffer, potentially leading to a 12-byte information leak or denial of service. Patch: https://lore.kernel.org/qemu-devel/CAJ9qJssSwxkmEVethg57-Ph6maEfButSaV-r07ma9_x1sp6wYg@mail.gmail.com/ Credit: Halil Oktay (oblivionsage)

Affected Software

1 affected component

Qemu Qemu

Event History

Feb 19, 2026

Data Sourced

via Red Hat·11:38 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What is the severity of REDHAT-BUG-2440934?

The severity of REDHAT-BUG-2440934 is critical due to the potential for information leaks and denial of service.

How do I fix REDHAT-BUG-2440934?

To fix REDHAT-BUG-2440934, apply the latest security patch as provided in the official updates for QEMU.

What causes the vulnerability in REDHAT-BUG-2440934?

REDHAT-BUG-2440934 is caused by a heap buffer over-read that occurs when processing a crafted VMDK file.

What are the potential impacts of exploiting REDHAT-BUG-2440934?

Exploiting REDHAT-BUG-2440934 can lead to information leakage or cause the application to crash.

Which software versions are affected by REDHAT-BUG-2440934?

QEMU versions that process VMDK files are affected by REDHAT-BUG-2440934.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.