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Qemu: [virtio-blk: zone report buffer out-of-memory] (CVE-2026-5761)

0
Medium
VulnerabilityCVE-2026-5761gcveosvubuntu-cve-2026-5761cve-2026-5761ubuntu-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 04/23/2026 (04/23/2026, 00:00:00 UTC)
Source: GCVE Database
Product: qemu

Description

CVE-2026-5761 is a medium severity vulnerability in QEMU related to the virtio-blk device, specifically a zone report buffer out-of-memory condition. It affects multiple Ubuntu package versions of QEMU. No CVSS score or detailed technical exploitation information is provided. There are no known exploits in the wild and no patch information is currently available.

Affected software

Ubuntu:24.04:LTSmore threats →ghsa
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=noble
Affected versions
=1:8.0.4+dfsg-1ubuntu3=1:8.0.4+dfsg-1ubuntu4=1:8.0.4+dfsg-1ubuntu5=1:8.1.3+ds-1ubuntu2=1:8.2.1+ds-1ubuntu1=1:8.2.1+ds-1ubuntu8=1:8.2.1+ds-1ubuntu9=1:8.2.2+ds-0ubuntu1=1:8.2.2+ds-0ubuntu1.2=1:8.2.2+ds-0ubuntu1.4=1:8.2.2+ds-0ubuntu1.5=1:8.2.2+ds-0ubuntu1.6=1:8.2.2+ds-0ubuntu1.7=1:8.2.2+ds-0ubuntu1.8=1:8.2.2+ds-0ubuntu1.9=1:8.2.2+ds-0ubuntu1.10=1:8.2.2+ds-0ubuntu1.11=1:8.2.2+ds-0ubuntu1.12=1:8.2.2+ds-0ubuntu1.13=1:8.2.2+ds-0ubuntu1.14=1:8.2.2+ds-0ubuntu1.15=1:8.2.2+ds-0ubuntu1.16=1:8.2.2+ds-0ubuntu1.17=1:8.2.2+ds-0ubuntu1.18
Ubuntu:25.10more threats →ghsa
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=questing
Affected versions
=1:9.2.1+ds-1ubuntu5=1:10.0.2+ds-1ubuntu1=1:10.0.2+ds-1ubuntu2=1:10.1.0+ds-1ubuntu1=1:10.1.0+ds-5ubuntu1=1:10.1.0+ds-5ubuntu2=1:10.1.0+ds-5ubuntu2.1=1:10.1.0+ds-5ubuntu2.2=1:10.1.0+ds-5ubuntu2.4=1:10.1.0+ds-5ubuntu2.5=1:10.1.0+ds-5ubuntu2.6=1:10.1.0+ds-5ubuntu2.7
Ubuntu:26.04:LTSmore threats →ghsa
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=resolute
Affected versions
=1:10.1.0+ds-5ubuntu2=1:10.1.0+ds-5ubuntu3=1:10.1.0+ds-5ubuntu4=1:10.1.0+ds-5ubuntu5=1:10.2.1+ds-1ubuntu1=1:10.2.1+ds-1ubuntu2=1:10.2.1+ds-1ubuntu3=1:10.2.1+ds-1ubuntu3.1=1:10.2.1+ds-1ubuntu3.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/06/2026, 19:05:22 UTC

Technical Analysis

This vulnerability involves the virtio-blk component in QEMU where a zone report buffer can run out of memory. The issue affects numerous specific Ubuntu QEMU package versions. The vulnerability is identified as CVE-2026-5761 and is classified with medium severity. No further technical details or exploitation methods are described in the available data. No CVSS score is assigned, and no vendor advisory or patch information is provided.

Potential Impact

The vulnerability could cause an out-of-memory condition in the virtio-blk zone report buffer within QEMU, potentially impacting the stability or functionality of the virtualized block device. The exact impact on confidentiality, integrity, or availability is not detailed. There are no known exploits in the wild.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor channels for updates. No specific mitigation steps are described in the available data.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-5761
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a74cf9ebf8831d5391b0420

Added to database: 08/06/2026, 18:17:02 UTC

Last enriched: 08/06/2026, 19:05:22 UTC

Last updated: 08/06/2026, 19:05:22 UTC

Views: 2

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