CVE-2026-48914

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

Published: Jun 12, 2026Updated: Aug 31, 2026 Sources: CVE List NVDCWE-122

6.7MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:LAttack Complexity

Low

PR:HPrivileges Required

High

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:HAvailability

High

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Weaknesses

CWE-122

Affected Products

Red Hat

commercial·US

Red Hat Enterprise Linux 10On-premOS

Operating Systems / linux-distro

Red Hat Enterprise Linux for NVIDIA 26On-premOS

Operating Systems / linux-distro

Red Hat OpenShift Container Platform 4SaaSSaaS Service

Cloud & SaaS / container-orchestration

and 5 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Privilege Escalation

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References

https://access.redhat.com/errata/RHSA-2026:39311

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:58571

access.redhat.com

https://access.redhat.com/security/cve/CVE-2026-48914

access.redhat.com

and 2 more references View all →

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