CVE-2017-6505 — The ohci_service_ed_list function in hw/usb/hcd-ohci

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-2017-93

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2017-03-15T14:59:01.150
• Last modified: 2026-05-13T00:24:29.033

09References

• git.qemu-project.org — http://git.qemu-project.org/?p=qemu.git%3Ba=commitdiff%3Bh=95ed56939eb2eaa4e2f34…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2017/03/06/6
• www.securityfocus.com — http://www.securityfocus.com/bid/96611
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1429432
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
• security.gentoo.org — https://security.gentoo.org/glsa/201704-01
• git.qemu-project.org — http://git.qemu-project.org/?p=qemu.git%3Ba=commitdiff%3Bh=95ed56939eb2eaa4e2f34…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2017/03/06/6
• www.securityfocus.com — http://www.securityfocus.com/bid/96611
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1429432