CVE-2015-3456

What it is

The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.

At a glance

Exploitability

Can be exploited from the same network segment with a login. High risk of data exposure, data tampering, service disruption.

Exploit odds

15.3% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2015-05-13 18:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:25 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 15.3% in the next 30 days (EPSS).
• Severity: 7.7 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2015-05-13 18:59 UTC

Last modified

2026-06-17 00:25 UTC

Exploit probability

15.3% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Qemu ≤ 2.3.0
• Redhat Enterprise Virtualization 3.0
• Redhat Openstack 4.0
• Redhat Openstack 5.0
• Redhat Openstack 6.0
• Redhat Openstack 7.0
• Redhat Enterprise Linux 5
• Redhat Enterprise Linux 6.0

Attack profile CVSS 2.0 · 7.7

Attack vector

Adjacent network

Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2015-3456.md and follow it. Check whether this project is affected by CVE-2015-3456. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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