Bug 2443789 (CVE-2026-3196)

Summary: CVE-2026-3196 qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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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.
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Bug Depends On: 2443814    
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Description OSIDB Bzimport 2026-03-02 11:49:57 UTC
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.

Upstream patch series:
https://lore.kernel.org/qemu-devel/20260220-virtio-snd-series-v1-0-207c4f7200a2@linaro.org/

QEMU fix commit:
https://gitlab.com/qemu-project/qemu/-/commit/61679d7dcfa2dffc8fb115aa19b09e0e7cf5ea5c