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high 7.7

CVE-2015-3456 in the critical feed json

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 (…

published 11y ago modified 4mo ago also EUVD-2015-3499

cvss
7.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.3%
EPSS 15.3% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.4.0-1
  • qemu Debian 14, Debian 13, Debian 12 1:2.3+dfsg-3

debian advisories DEBIAN-CVE-2015-3456

  • xen Ubuntu 14.04 LTS 4.4.1-0ubuntu0.14.04.6
  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.11
  • virtualbox Ubuntu 14.04 LTS 4.3.10-dfsg-1ubuntu5

ubuntu advisories UBUNTU-CVE-2015-3456

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • rhev-hypervisor6 RHEL 6 6.6-20150512.0.el6ev
  • rhev-hypervisor7 RHEL 7 7.1-20150512.1.el7ev
  • qemu-kvm-rhev RHEL 6, openstack 5, openstack 4 2:0.12.1.2-2.448.el6_6.3
  • qemu-img-rhev RHEL 6, openstack 5, openstack 4 2:0.12.1.2-2.448.el6_6.3
  • qemu-kvm-rhev-tools RHEL 6, openstack 5, openstack 4 2:0.12.1.2-2.448.el6_6.3
  • xen RHEL 5 VIRTUALIZATION, RHEL 5 3.0.3-146.el5_11
  • xen-libs RHEL 5 3.0.3-146.el5_11
  • qemu-kvm RHEL 7 10:1.5.3-86.el7_1.2

red hat advisories RHSA-2015:1031RHSA-2015:1011RHSA-2015:1001RHSA-2015:1002RHSA-2015:0999RHSA-2015:1003

  • xen SLES for SAP 12, SLES 12, SLED 12 +1 more 4.4.2_04-18.1
  • qemu SLES for SAP 12, SLES 12, SLED 12 2.0.2-46.1

suse advisories SUSE-SU-2015:0923-1SUSE-SU-2015:0896-1

  • virtualbox openSUSE Tumbleweed 5.1.10-2.5
  • xen openSUSE Tumbleweed 4.7.0_12-1.3
  • qemu openSUSE Tumbleweed 2.6.1-1.5

opensuse advisories openSUSE-SU-2024:10020-1openSUSE-SU-2024:10196-1openSUSE-SU-2024:10233-1

Is CVE-2015-3456 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3456 updated cvss 6.5

qemu: fdc: out-of-bounds fifo buffer memory access

  • Red Hat Enterprise Linux 5 kvm
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) xen 3.0.3-146.el5_11, xen-libs 3.0.3-146.el5_11
    fixed: vendor fix RHSA-2015:1002
  • Red Hat Enterprise Linux Client (v. 7) qemu-img 1.5.3-86.el7_1.2, qemu-kvm 1.5.3-86.el7_1.2, libcacard 1.5.3-86.el7_1.2, qemu-kvm-tools 1.5.3-86.el7_1.2, qemu-kvm-common 1.5.3-86.el7_1.2 Red Hat Enterprise Linux Client Optional (v. 7) libcacard-tools 1.5.3-86.el7_1.2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img 1.5.3-86.el7_1.2, qemu-kvm 1.5.3-86.el7_1.2, libcacard 1.5.3-86.el7_1.2, qemu-kvm-tools 1.5.3-86.el7_1.2, libcacard-tools 1.5.3-86.el7_1.2, qemu-kvm-common 1.5.3-86.el7_1.2
    fixed: vendor fix RHSA-2015:0999
  • Red Hat Enterprise Linux Desktop (v. 5 client) xen 3.0.3-146.el5_11, xen-libs 3.0.3-146.el5_11
    fixed: vendor fix RHSA-2015:1002
  • Red Hat Enterprise Linux Desktop (v. 6) qemu-img 0.12.1.2-2.448.el6_6.3, qemu-kvm 0.12.1.2-2.448.el6_6.3, qemu-kvm-tools 0.12.1.2-2.448.el6_6.3, qemu-guest-agent 0.12.1.2-2.448.el6_6.3
    fixed: vendor fix RHSA-2015:0998
  • Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) kvm 83-272.el5_11, xen 3.0.3-146.el5_11, kmod-kvm 83-272.el5_11, kvm-tools 83-272.el5_11, kvm-qemu-img 83-272.el5_11
    fixed: vendor fix RHSA-2015:1002
  • Red Hat Enterprise Linux HPC Node (v. 6) qemu-img 0.12.1.2-2.448.el6_6.3, qemu-kvm 0.12.1.2-2.448.el6_6.3, qemu-kvm-tools 0.12.1.2-2.448.el6_6.3, qemu-guest-agent 0.12.1.2-2.448.el6_6.3
    fixed: vendor fix RHSA-2015:0998
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.5) qemu-img 0.12.1.2-2.415.el6_5.15, qemu-kvm 0.12.1.2-2.415.el6_5.15, qemu-kvm-tools 0.12.1.2-2.415.el6_5.15, qemu-guest-agent 0.12.1.2-2.415.el6_5.15
    fixed: vendor fix RHSA-2015:1031
show 12 more
  • Red Hat Enterprise Linux OpenStack Platform 4.0 qemu-img-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev-tools 0.12.1.2-2.448.el6_6.3 Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 qemu-img-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev-tools 0.12.1.2-2.448.el6_6.3 Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 qemu-img-rhev 2.1.2-23.el7_1.3, qemu-kvm-rhev 2.1.2-23.el7_1.3, libcacard-rhev 2.1.2-23.el7_1.3, qemu-kvm-tools-rhev 2.1.2-23.el7_1.3, libcacard-devel-rhev 2.1.2-23.el7_1.3, libcacard-tools-rhev 2.1.2-23.el7_1.3, +1 more Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 qemu-img-rhev 2.1.2-23.el7_1.3, qemu-kvm-rhev 2.1.2-23.el7_1.3, libcacard-rhev 2.1.2-23.el7_1.3, qemu-kvm-tools-rhev 2.1.2-23.el7_1.3, libcacard-devel-rhev 2.1.2-23.el7_1.3, libcacard-tools-rhev 2.1.2-23.el7_1.3, +1 more
    fixed: vendor fix RHSA-2015:1004
  • Red Hat Enterprise Linux Server (v. 6) qemu-img 0.12.1.2-2.448.el6_6.3, qemu-kvm 0.12.1.2-2.448.el6_6.3, qemu-kvm-tools 0.12.1.2-2.448.el6_6.3, qemu-guest-agent 0.12.1.2-2.448.el6_6.3
    fixed: vendor fix RHSA-2015:0998
  • Red Hat Enterprise Linux Server (v. 7) qemu-img 1.5.3-86.el7_1.2, qemu-kvm 1.5.3-86.el7_1.2, libcacard 1.5.3-86.el7_1.2, qemu-kvm-tools 1.5.3-86.el7_1.2, qemu-kvm-common 1.5.3-86.el7_1.2
    fixed: vendor fix RHSA-2015:0999
  • Red Hat Enterprise Linux Server EUS (v. 6.5) qemu-img 0.12.1.2-2.415.el6_5.15, qemu-kvm 0.12.1.2-2.415.el6_5.15, qemu-kvm-tools 0.12.1.2-2.415.el6_5.15, qemu-guest-agent 0.12.1.2-2.415.el6_5.15
    fixed: vendor fix RHSA-2015:1031
  • Red Hat Enterprise Linux Server Optional (v. 7) libcacard 1.5.3-86.el7_1.2, libcacard-tools 1.5.3-86.el7_1.2
    fixed: vendor fix RHSA-2015:0999
  • Red Hat Enterprise Linux Virtualization (v. 5 server) kvm 83-272.el5_11, xen 3.0.3-146.el5_11, kmod-kvm 83-272.el5_11, kvm-tools 83-272.el5_11, kvm-qemu-img 83-272.el5_11
    fixed: vendor fix RHSA-2015:1002
  • Red Hat Enterprise Linux Workstation (v. 6) qemu-img 0.12.1.2-2.448.el6_6.3, qemu-kvm 0.12.1.2-2.448.el6_6.3, qemu-kvm-tools 0.12.1.2-2.448.el6_6.3, qemu-guest-agent 0.12.1.2-2.448.el6_6.3
    fixed: vendor fix RHSA-2015:0998
  • Red Hat Enterprise Linux Workstation (v. 7) qemu-img 1.5.3-86.el7_1.2, qemu-kvm 1.5.3-86.el7_1.2, libcacard 1.5.3-86.el7_1.2, qemu-kvm-tools 1.5.3-86.el7_1.2, qemu-kvm-common 1.5.3-86.el7_1.2 Red Hat Enterprise Linux Workstation Optional (v. 7) libcacard-tools 1.5.3-86.el7_1.2
    fixed: vendor fix RHSA-2015:0999
  • Red Hat RHEL 7-based RHEV-H rhev-hypervisor7 7.1-20150512.1.el7ev
    fixed: vendor fix RHSA-2015:1011
  • Red Hat RHEV Agents (vdsm) qemu-img-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev 0.12.1.2-2.448.el6_6.3, qemu-kvm-rhev-tools 0.12.1.2-2.448.el6_6.3
    fixed: vendor fix RHSA-2015:1001
  • Red Hat RHEV Hypervisor for RHEL-6 rhev-hypervisor6 6.6-20150512.0.el6ev
    fixed: vendor fix RHSA-2015:1011
  • Red Hat RHEV-H and VDSM for 7 Hosts qemu-img-rhev 2.1.2-23.el7_1.3, qemu-kvm-rhev 2.1.2-23.el7_1.3, libcacard-rhev 2.1.2-23.el7_1.3, qemu-kvm-tools-rhev 2.1.2-23.el7_1.3, libcacard-devel-rhev 2.1.2-23.el7_1.3, libcacard-tools-rhev 2.1.2-23.el7_1.3, +1 more
    fixed: vendor fix RHSA-2015:1000

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. First public exploit (EDB-37053)

Exploit prediction

15.28% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-37053 QEMU - Floppy Disk Controller (FDC) (PoC) dos, 2015-05-18

CVSS scores

assigned by version score vector
NVD 2.0 7.7 AV:A/AC:L/Au:S/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.