CVE-2026-48914
Qemu-kvm: heap buffer overflow in virtio-blk scsi request handling
- State
- Published
- Severity
- 6.7 Medium
- Published
- Jun 12, 2026
- Updated
- Aug 31, 2026
- Reserved
- May 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.7 Medium | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H | redhat |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
qemu |
|
Red Hat Enterprise Linux 10Red Hat |
|
Red Hat Enterprise Linux 9Red Hat |
|
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux for NVIDIA 26Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:39311vendor-advisory
- RHSA-2026:58571vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-48914vdb-entry
- RHBZ#2488283issue-tracking
- https://lore.kernel.org/qemu-devel/20260526154957.1741622-1-stefanha@redhat.com/
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.