CVE-2026-3196 Red Hat CVE debrief

Who should care

Defenders of virtualized environments using the virtio-snd device should be aware of this vulnerability. Specifically, those using Red Hat products, as referenced in the vulnerability details, should review their exposure. This vulnerability could lead to a denial of service condition if exploited.

Technical summary

The integer overflow vulnerability in the virtio-snd device occurs via PCM_INFO requests from the guest. This allows a malicious guest to provide out-of-bounds stream counts. The potential impact is unbounded memory allocation on the host, leading to a denial of service condition. The vulnerability is characterized by a CVSS vector of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating a local attack vector with low attack complexity and privileges required.

Defensive priority

Medium priority due to potential for denial of service

Recommended defensive actions

• Review and inventory virtio-snd device usage in your environment
• Apply patches or updates from your vendor as they become available
• Monitor for unusual activity or guest behavior that could indicate exploitation attempts
• Consider compensating controls such as limiting guest privileges or enhancing network segmentation
• Review official advisories from Red Hat for specific guidance on mitigation and remediation

Evidence notes

The primary evidence for this vulnerability comes from the NVD and CVE.org records. The vulnerability affects the virtio-snd device, potentially impacting virtualized environments. The evidence suggests that Red Hat products may be affected, but specific product versions and scope are not detailed in the provided information. Defenders should verify the specific products and versions in use against official advisories.

Official resources