CVE-2026-3196: Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-19 · updated 2026-06-22
Weakness: CWE-190

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.

References

https://access.redhat.com/security/cve/CVE-2026-3196
https://bugzilla.redhat.com/show_bug.cgi?id=2443789

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