CVE-2026-3195: Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)

highCVSS 7.4CVE-2026-3195

CSIRTS triage

vendor: Qemu product: Qemu-kvm Memory corruption

What: A heap buffer overflow occurs in virtio_snd_pcm_in_cb, which is an incomplete fix for a previous CVE.
Who is affected: Deployments using Qemu-kvm are affected.
Urgency: Remediation is urgent due to the high severity of the vulnerability.
Action: Update to the fixed version addressing CVE-2026-3195.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.4
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3195

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-31950.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-3195	coverage & exploitation status	NVD · CVE.org

Recent advisories for Qemu-kvm

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-48914: Qemu-kvm: heap buffer overflow in virtio-blk scsi request handlingmsrc · 2026-06-09
mediumCVE-2026-3196: Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocationmsrc · 2026-06-09