How severe is CVE-2015-3456?

CVE-2015-3456 has a CVSS 2.0 base score of 7.7, rated high severity.

Is CVE-2015-3456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3456?

CVE-2015-3456 primarily affects Qemu. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-3456 published?

CVE-2015-3456 was published on 2015-05-13 and last updated on 2026-06-17.

CVE-2015-3456

CVE-2015-3456 is a high-severity vulnerability in Qemu with a CVSS 2.0 base score of 7.7. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.7)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Qemu
Published: 2015-05-13
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2015-3456?: 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.
How severe is CVE-2015-3456?: CVE-2015-3456 has a CVSS 2.0 base score of 7.7, rated high severity.
Is CVE-2015-3456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3456?: CVE-2015-3456 primarily affects Qemu. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-3456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-3456 published?: CVE-2015-3456 was published on 2015-05-13 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:enterprise_virtualization:3.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:5.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*

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