CVE-2026-3195

Host memory corruption via virtio-snd input overflow

Published Jun 19, 2026 · Updated Jun 19, 2026

Heap-based buffer overflow in QEMU 8.2.0 through 10.2.1 allows guest OS users to corrupt host-process memory through virtio-snd input. The virtio_snd_pcm_in_cb callback retains the status-header length in its capacity calculation and lets AUD_read exceed the remaining buffer space. A guest must configure and exercise virtio-snd input; corruption affects the QEMU host process, but no public exploit establishes code execution.

CVSS severity7.4
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in QEMU 8.2.0 through 10.2.1 allows guest OS users to corrupt host-process memory through virtio-snd input. The virtio_snd_pcm_in_cb callback retains the status-header length in its capacity calculation and lets AUD_read exceed the remaining buffer space. A guest must configure and exercise virtio-snd input; corruption affects the QEMU host process, but no public exploit establishes code execution.

The record

CVE
CVE-2026-3195
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
QEMU Project
Product
QEMU
Classifications
CWE-122, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.2.0 <=10.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

QEMU Project · QEMUversion=8.2.0 <=10.2.1

Published CVSS scores

7.4redhat-SADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.4Fedora ProjectCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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