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CVE-2026-3196· NVD / CVE Program· CNA fedora

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

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 19, 2026
Updated
Jun 22, 2026
EPSS
0.1% · 3th percentile
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Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · fedora
5.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (fedora). Independent of NVD's CPE analysis and usually ahead of it.

  • gitlab.com/qemu-project/qemu qemu

    • 8.2.0 and later · up to and including 10.2.1affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13qemubefore 1:10.0.10+ds-0+deb13u11:10.0.10+ds-0+deb13u1
Debian:14qemubefore 1:10.2.2+ds-11:10.2.2+ds-1
openSUSE:Leap 16.0qemubefore 10.0.9-160000.1.110.0.9-160000.1.1
openSUSE:Leap 16.0qemu-linux-userbefore 10.0.9-160000.1.110.0.9-160000.1.1
openSUSE:Tumbleweedqemubefore 10.2.2-1.110.2.2-1.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7qemubefore 9.2.4-150700.3.20.19.2.4-150700.3.20.1
SUSE:Linux Enterprise Module for Package Hub 15 SP7qemu-linux-userbefore 9.2.4-150700.3.20.19.2.4-150700.3.20.1
SUSE:Linux Enterprise Server 15 SP6-LTSSqemubefore 8.2.10-150600.3.49.18.2.10-150600.3.49.1
SUSE:Linux Micro 6.2qemubefore 10.0.9-160000.1.110.0.9-160000.1.1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

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    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
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  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor
  • CVE-2025-4404Freeipa: idm: privilege escalation from host to domain admin in freeipa
    37Monitor
  • CVE-2025-7493Freeipa: idm: privilege escalation from host to domain admin in freeipa
    36Monitor
  • CVE-2025-49796Libxml: type confusion leads to denial of service (dos)
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:qemu1:10.0.10+ds-0+deb13u1 · Debian:13Package registry (OSV)
opensuse:qemu10.2.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:qemu-linux-user10.0.9-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:qemu10.0.9-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:qemu-linux-user9.2.4-150700.3.20.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-106493 days apartPacemaker: pacemaker: denial of service via integer overflow in remote message decompression
    34Monitor
  • CVE-2026-1011818 days apartPoppler: integer overflow in poppler splashoutputdev::tilingpatternfill leads to heap buffer overflow via unchecked dimension multiplication
    31Monitor
  • CVE-2026-537054 days apartGstreamer1-plugins-good: gstreamer: heap buffer overflow in wavpack decoder via integer overflow
    30Monitor
  • CVE-2026-1652941 days apartPcp: pcp: denial of service due to signed integer overflow
    30Monitor
  • CVE-2026-527224 days apartGstreamer1-plugins-bad-free: gstreamer: signed integer overflow in vmnc decoder cursor payload handling
    28Monitor
  • CVE-2026-1938951 days apartGstreamer: gstreamer1-plugins-ugly-free: gstreamer: integer overflow/underflow in asfdemux bounds checks leading to out-of-bounds read
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records