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NVD / CVE Program· CNA redhat

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

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 qemu 9.1.0-7 on Azure Linux 3.0 9.1.0-8; azl3 qemu 9.1.0-8 on Azure Linux 3.0 9.1.0-8; azl3 qemu 9.1.0-9 on Azure Linux 3.0 9.1.0-8.

Low priority for now. Upgrade to azl3 qemu 9.1.0-7 on Azure Linux 3.0 9.1.0-8; azl3 qemu 9.1.0-8 on Azure Linux 3.0 9.1.0-8; azl3 qemu 9.1.0-9 on Azure Linux 3.0 9.1.0-8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.7 · v3.1—No exploit Fix available
Published
Jun 12, 2026
Updated
Nov 5, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.7 / 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 · redhat
6.7
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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-48914

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

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

  • gitlab.com/qemu-project/qemu qemu

    • 1.1.0 and later · up to and including 11.0.1affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • 18:10.1.0-16.el10_2.5 and laternot affected · rpm

  • 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 versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • 17:10.1.0-17.el9_8.4 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux for NVIDIA 26

    • all versionsaffected

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat OpenShift Container Platform 5

    • all versionsaffected

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10qemu-guest-agentbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-imgbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvmbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-audio-pabefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-block-blkiobefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-block-curlbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-block-rbdbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-commonbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-corebefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-display-virtio-gpubefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-display-virtio-gpu-ccwbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-display-virtio-gpu-pcibefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-display-virtio-vgabefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-usb-hostbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-device-usb-redirectbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-docsbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-toolsbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-ui-egl-headlessbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-kvm-ui-openglbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:10qemu-pr-helperbefore 18:10.1.0-16.el10_2.5.alma.118:10.1.0-16.el10_2.5.alma.1
AlmaLinux:9qemu-guest-agentbefore 17:10.1.0-17.el9_8.4.alma.117:10.1.0-17.el9_8.4.alma.1
AlmaLinux:9qemu-imgbefore 17:10.1.0-17.el9_8.4.alma.117:10.1.0-17.el9_8.4.alma.1
AlmaLinux:9qemu-kvmbefore 17:10.1.0-17.el9_8.4.alma.117:10.1.0-17.el9_8.4.alma.1
AlmaLinux:9qemu-kvm-audio-pabefore 17:10.1.0-17.el9_8.4.alma.117:10.1.0-17.el9_8.4.alma.1

+96

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-10230Samba: command injection in wins server hook script
    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
    44Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-53701Jun 11, 2026 · Gstreamer1-plugins-bad-free: gstreamer: out-of-bounds write in h.266/vvc pps picture partition parser
    26Monitor
  • ← EarlierCVE-2026-53702Jun 11, 2026 · Gstreamer1-plugins-bad-free: gstreamer: stack buffer overflow in h.265 buffering period sei parser
    26Monitor
  • Later →CVE-2026-53705Jun 15, 2026 · Gstreamer1-plugins-good: gstreamer: heap buffer overflow in wavpack decoder via integer overflow
    30Monitor

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
azl3 qemu 9.1.0-7 on Azure Linux 3.09.1.0-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 qemu 9.1.0-8 on Azure Linux 3.09.1.0-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 qemu 9.1.0-9 on Azure Linux 3.09.1.0-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:qemu-guest-agent17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-img17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-audio-pa17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-block-blkio17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-block-curl17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-block-rbd17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-common17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-core17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-device-display-virtio-gpu17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-device-display-virtio-gpu-ccw17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
almalinux:qemu-kvm-device-display-virtio-gpu-pci17:10.1.0-17.el9_8.4.alma.1 · AlmaLinux:9Package registry (OSV)
debian:qemu1:10.0.11+ds-0+deb13u1 · Debian:13Package registry (OSV)
opensuse:qemu11.0.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:qemu-linux-user10.0.11-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:qemu-guest-agent17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-guest-agent-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-img17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-img-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-audio-dbus-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-audio-pa17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-audio-pa-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-block-blkio17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-block-blkio-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-block-curl17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:qemu-kvm-block-curl-debuginfo17:10.1.0-17.el9_8.4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+3

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.

No history yet (it accumulates with the daily EPSS job).

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-2026-527203 days apartGstreamer1-plugins-bad-free: gstreamer: heap buffer overflow via crafted vnc server rectangle in librfb
    35Monitor
  • CVE-2026-121997146 days apartGdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mismatch
    32Monitor
  • CVE-2026-8166584 days apartCorosync: corosync: heap-based buffer overflow in totempg assembly buffer during fragmented message reassembly
    30Monitor
  • CVE-2026-107161117 days apartCyrus-sasl: heap buffer overflow in cyrus-sasl add_to_challenge() allows malicious server to crash or compromise digest-md5 clients
    30Monitor
  • CVE-2026-31957 days apartQemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)
    29Monitor
  • CVE-2026-1291217 days apartLibtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image
    29Monitor

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.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
Low
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

Show all references (4 more)

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

All records