Medium · CVSS 6.7CVE-2026-48914

Qemu-kvm: heap buffer overflow in virtio-blk scsi request handlingCVE-2026-48914

Answer in brief

CVE-2026-48914 records a Medium severity (CVSS 6.7) vulnerability in Qemu-kvm: heap buffer overflow in virtio-blk scsi request handling. The current sources do not mark it as known exploited. The current feed maps Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic), qemu (generic), Red Hat/qemu-kvm (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 12, 2026Updated Aug 31, 2026Source checked Oct 5, 2026First seen by HOL Jul 13, 2026Material review Aug 31, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.7
Exploitation: Not marked as known exploited
Affected software: 5 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/openshift/ose-rhel-coreos-8 (generic), Red Hat/openshift/ose-rhel-coreos-9 (generic), qemu (generic), Red Hat/qemu-kvm (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Red Hat/openshift/ose-rhel-coreos-8generic	*	Not reported
Red Hat/openshift/ose-rhel-coreos-9generic	*	Not reported
qemugeneric	>=1.1.0 <=11.0.1	Not reported
Red Hat/qemu-kvmgeneric	*	Not reported
Red Hat/virt:rhel/qemu-kvmgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/openshift/ose-rhel-coreos-8, Red Hat/openshift/ose-rhel-coreos-9, qemu.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jun 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 13, 2026

Sources and claim methodology

Upstream source description

A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process.

Quoted source text, attributed separately from HOL analysis.