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

Quick assessment

Affected
CVE-2026-3196
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fabrice Bellard QEMU是Fabrice Bellard个人开发者开源的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 Fabrice Bellard QEMU 8.2.0至10.2.1版本存在安全漏洞，该漏洞源于virtio-snd设备整数溢出问题，通过PCM_INFO请求，恶意客户机提供超出范围的流计数，可能导致主机上无限制的内存分配和拒绝服务。

CVSS 5.5 · Medium EPSS 0.14% · P3

Affected Version Matrix 8

VendorProduct Version RangeStatus
None None 8.2.0≤ 10.2.1 affected
Red Hat Red Hat Enterprise Linux 10 any unaffected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 any unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected

I. Basic Information for CVE-2026-3196

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Fabrice Bellard QEMU 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fabrice Bellard QEMU是Fabrice Bellard个人开发者开源的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 Fabrice Bellard QEMU 8.2.0至10.2.1版本存在安全漏洞，该漏洞源于virtio-snd设备整数溢出问题，通过PCM_INFO请求，恶意客户机提供超出范围的流计数，可能导致主机上无限制的内存分配和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 8.2.0 ~ 10.2.1 -
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-3196

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-3196

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Vendor Advisories for CVE-2026-3196 (1)

Other References for CVE-2026-3196 (1)

IV. Related Vulnerabilities

Same weakness: CWE-190

V. Comments for CVE-2026-3196

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