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 (o
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.
- Published
- May 13, 2015
- Updated
- Jun 16, 2026
- EPSS
- 15.3% · 97th percentile
- CWE
- CWE-119
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 15.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| qemu | qemu | cpe:2.3:a:qemu:qemu |
| redhat | enterprise virtualization | cpe:2.3:a:redhat:enterprise_virtualization |
| redhat | openstack | cpe:2.3:a:redhat:openstack |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| xen | xen | cpe:2.3:o:xen:xen |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- qemu qemuup to 2.3.0 inclusive
- redhat enterprise linux5
- redhat enterprise linux6.0
- redhat enterprise linux7.0
- redhat enterprise virtualization3.0
- redhat openstack4.0
- redhat openstack5.0
- redhat openstack6.0
- redhat openstack7.0
- xen xen4.5.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | qemu | before 1:2.3+dfsg-3 | 1:2.3+dfsg-3 |
| Debian:12 | xen | before 4.4.0-1 | 4.4.0-1 |
| Debian:6.0 | qemu | before 0.12.5+dfsg-3squeeze5 | 0.12.5+dfsg-3squeeze5 |
| Debian:6.0 | qemu-kvm | before 0.12.5+dfsg-5+squeeze12 | 0.12.5+dfsg-5+squeeze12 |
| Debian:6.0 | virtualbox-ose | before 3.2.10-dfsg-1+squeeze4 | 3.2.10-dfsg-1+squeeze4 |
| Debian:7 | virtualbox | before 4.1.18-dfsg-2+deb7u5 | 4.1.18-dfsg-2+deb7u5 |
| Debian:7 | xen | before 4.1.4-3+deb7u6 | 4.1.4-3+deb7u6 |
| Debian:8 | qemu | before 1:2.1+dfsg-12 | 1:2.1+dfsg-12 |
| Debian:8 | virtualbox | before 4.3.18-dfsg-3+deb8u2 | 4.3.18-dfsg-3+deb8u2 |
| openSUSE:Tumbleweed | virtualbox | before 5.1.10-2.5 | 5.1.10-2.5 |
| Red Hat:enterprise_linux:5::client | xen | before 0:3.0.3-146.el5_11 | 0:3.0.3-146.el5_11 |
| Red Hat:enterprise_linux:5::client | xen-debuginfo | before 0:3.0.3-146.el5_11 | 0:3.0.3-146.el5_11 |
| Red Hat:enterprise_linux:5::client | xen-libs | before 0:3.0.3-146.el5_11 | 0:3.0.3-146.el5_11 |
| Red Hat:enterprise_linux:6::client | qemu-guest-agent | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::client | qemu-img | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::client | qemu-kvm | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::client | qemu-kvm-debuginfo | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::client | qemu-kvm-tools | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::hypervisor | qemu-img-rhev | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::hypervisor | qemu-kvm-rhev | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::hypervisor | qemu-kvm-rhev-debuginfo | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::hypervisor | qemu-kvm-rhev-tools | before 2:0.12.1.2-2.448.el6_6.3 | 2:0.12.1.2-2.448.el6_6.3 |
| Red Hat:enterprise_linux:6::hypervisor | rhev-hypervisor6 | before 0:6.6-20150512.0.el6ev | 0:6.6-20150512.0.el6ev |
| Red Hat:enterprise_linux:7::client | libcacard | before 10:1.5.3-86.el7_1.2 | 10:1.5.3-86.el7_1.2 |
+30
Same product
qemu: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-12928The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command injection, which allows the remote attacker to achieve46Plan
- CVE-2015-8556Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.44Plan
- CVE-2017-15118A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an expor43Plan
- CVE-2022-36648The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier, allows remote attackers 41Plan
- CVE-2017-16845hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-of-bounds access.41Plan
- CVE-2016-7161Heap-based buffer overflow in the .receive callback of xlnx.xps-ethernetlite in QEMU (aka Quick Emulator) allows attackers to execute arbitr41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:qemu | 1:2.3+dfsg-3 · Debian:12 | Package registry (OSV) |
| debian:qemu-kvm | 0.12.5+dfsg-5+squeeze12 · Debian:6.0 | Package registry (OSV) |
| debian:virtualbox | 4.1.18-dfsg-2+deb7u5 · Debian:7 | Package registry (OSV) |
| debian:virtualbox-ose | 3.2.10-dfsg-1+squeeze4 · Debian:6.0 | Package registry (OSV) |
| debian:xen | 4.4.0-1 · Debian:12 | Package registry (OSV) |
| opensuse:virtualbox | 5.1.10-2.5 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:libcacard | 10:1.5.3-86.el7_1.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libcacard-devel | 10:1.5.3-86.el7_1.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libcacard-devel-rhev | 10:2.1.2-23.el7_1.3 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:libcacard-rhev | 10:2.1.2-23.el7_1.3 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:libcacard-tools | 10:1.5.3-86.el7_1.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libcacard-tools-rhev | 10:2.1.2-23.el7_1.3 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:qemu-guest-agent | 2:0.12.1.2-2.448.el6_6.3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:qemu-img | 2:0.12.1.2-2.448.el6_6.3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:qemu-kvm | 2:0.12.1.2-2.448.el6_6.3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:qemu-kvm-common | 10:1.5.3-86.el7_1.2 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:qemu-kvm-debuginfo | 2:0.12.1.2-2.448.el6_6.3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:qemu-kvm-tools | 2:0.12.1.2-2.448.el6_6.3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| suse:qemu | 2.0.2-46.1 · SUSE:Linux Enterprise Desktop 12 | Package registry (OSV) |
| suse:xen | 4.4.2_04-18.1 · SUSE:Linux Enterprise Desktop 12 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
- Proof-of-concept repository on GitHub ×2
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2015-05-18 |
| Proof-of-concept repository on GitHub | stars:13 | 2015-05-17 |
| Proof-of-concept repository on GitHub | stars:0 | 2018-12-03 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+3 d
- TodaySep 30, 2026+4158 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- C · data can be read
- Integrity
- C · data or configuration can be modified
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- C
- Integrity impact
- C
- Availability impact
- C
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
AV:A/AC:L/Au:S/C:C/I:C/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- venom.crowdstrike.com/
- git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=e907746266721f305d67bc0718795fedee2e824c
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10693
- lists.fedoraproject.org/pipermail/package-announce/2015-May/158072.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00009.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00013.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00014.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00018.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00019.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00021.html
- lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
- lists.opensuse.org/opensuse-security-announce/2015-06/msg00001.html
- lists.opensuse.org/opensuse-updates/2015-08/msg00021.html
- marc.info/?l=bugtraq&m=143229451215900&w=2
- marc.info/?l=bugtraq&m=143387998230996&w=2
- rhn.redhat.com/errata/RHSA-2015-0998.html
- rhn.redhat.com/errata/RHSA-2015-0999.html
- rhn.redhat.com/errata/RHSA-2015-1000.html
- rhn.redhat.com/errata/RHSA-2015-1001.html
- rhn.redhat.com/errata/RHSA-2015-1002.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.