CVE-2026-3196 Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation
A malicious guest can trigger an integer overflow in QEMU's virtio-snd device, causing unbounded memory allocation and host denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3196?
CVE-2026-3196 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 19 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An integer overflow vulnerability was found in the virtio-snd device via PCM_INFO requests from the guest. A malicious guest can provide out-of-bounds stream counts, potentially leading to unbounded memory allocation on the host and a denial of service condition.
Weakness: CWE-190
Which versions are affected by CVE-2026-3196?
How do I fix CVE-2026-3196?
Apply the vendor's patch.
Is CVE-2026-3196 being exploited?
There is no known exploitation of CVE-2026-3196 in the wild and no public exploit code.
Sources
Also known as AZL-91272, BELL-CVE-2026-3196, DEBIAN-CVE-2026-3196, GHSA-crqh-2v7r-3m9w, UBUNTU-CVE-2026-3196.