What is CVE-2017-6505?

CVE-2017-6505 is a medium-severity vulnerability in Qemu, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2017-03-15.

How severe is CVE-2017-6505?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Qemu

CVE-2017-6505

The ohci_service_ed_list function in hw/usb/hcd-ohci.c in QEMU (aka Quick Emulator) before 2.9.0 allows local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors, a different vulnerability than CVE-2017-9330.

Published 2017-03-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Qemu

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

lists.debian.org/debian-lts-announce/2018/09/msg00007.html (mailing-list, Third Party Advisory)
git.qemu-project.org/
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
security.gentoo.org/glsa/201704-01 (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/96611 (VDB Entry, Third Party Advisory, vdb-entry)
www.openwall.com/lists/oss-security/2017/03/06/6 (mailing-list, Patch, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2017-6505?: CVE-2017-6505 is a medium-severity vulnerability in Qemu, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2017-03-15.
How severe is CVE-2017-6505?: Medium severity. CVSS v3 base score is 6.5 out of 10.