CVE-2015-3456

Severity: high (CVSS 7.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2015-05-13 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

QEMU: through 2.3.0
Red Hat Enterprise Linux: 5, 6.0, 7.0
RedHat Enterprise Virtualization: 3.0
OpenStack: 4.0, 5.0, 6.0, 7.0
xen: 4.5.0

References

http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=e907746266721f305d67bc0718795fedee2e824c
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10693
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158072.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00001.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00021.html

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