CVE-2026-48914
Qemu-kvm: heap buffer overflow in virtio-blk scsi request handling
MEDIUM 6.7
At a glance
- Source
- NVD
- EPSS
- EPSS 0.16 % · percentile 5 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
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.
Weaknesses (CWE)
- CWE-122 — Heap-based Buffer Overflow
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H | redhat |
| CVSS 3.1 | MEDIUM 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H | NVD · secalert@redhat.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-36408
- GCVE · GCVE-0-2026-48914
CERT-FR advisories
- CERTFR-2026-AVI-0783 — Multiples vulnérabilités dans Microsoft Azure · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| qemu | affected 1.1.0 ≤ 11.0.1 |
| Red Hat · Red Hat Enterprise Linux 10 | unaffected 18:10.1.0-16.el10_2.5 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 17:10.1.0-17.el9_8.4 < * |
| Red Hat · Red Hat Enterprise Linux 6 | |
| Red Hat · Red Hat Enterprise Linux 7 | |
| Red Hat · Red Hat Enterprise Linux 7 | |
| Red Hat · Red Hat Enterprise Linux 8 | |
| Red Hat · Red Hat Enterprise Linux for NVIDIA 26 | |
| Red Hat · Red Hat OpenShift Container Platform 4 | |
| Red Hat · Red Hat OpenShift Container Platform 4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |