Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation

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.

Scores

EPSS (exploitation in 30 days)

0.14% · top 96% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

• CWE-190: Integer Overflow or Wraparound (opens in a new tab)All about CWE-190 and its CVEs

Affected products

• qemu

  • affected 8.2.0 – ≤ 10.2.1

• Red Hat · Red Hat Enterprise Linux 10

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 6

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 8

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 9

  All versions: unaffected

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: unaffected

References (2)

• https://access.redhat.com/security/cve/CVE-2026-3196 (opens in a new tab)vdb-entryx_refsource_REDHAT
• RHBZ#2443789 (opens in a new tab)issue-trackingx_refsource_REDHAT

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-3196](https://trackcve.app/badge/CVE-2026-3196.svg)](https://trackcve.app/cve/CVE-2026-3196)

Record last updated 22 Jun 2026, 15:54 UTC.