CVE-2025-47712 Nbd: nbdkit: integer overflow triggers an assertion resulting in denial of service
An integer overflow in the nbdkit blocksize filter allows a client to trigger an assertion failure, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-47712?
CVE-2025-47712 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 9 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw exists in the nbdkit "blocksize" filter that can be triggered by a specific type of client request. When a client requests block status information for a very large data range, exceeding a certain limit, it causes an internal error in the nbdkit, leading to a denial of service.
Weakness: CWE-190
Which versions are affected by CVE-2025-47712?
It affects 1 product.
Products include Nbdkit Project Nbdkit.
How do I fix CVE-2025-47712?
Apply the vendor's patch.
Is CVE-2025-47712 being exploited?
There is no known exploitation of CVE-2025-47712 in the wild and no public exploit code.
Other vulnerabilities in Red Hat Enterprise Linux 10
Sources
Also known as AZL-63798, AZL-63875, CLSA-2026-1777021155, DEBIAN-CVE-2025-47712, GHSA-fpfc-3gjg-hfhp, UBUNTU-CVE-2025-47712.