MEDIUM
CVE-2016-2391
CWE-476Published: June 16, 2016· Updated: Jun 17, 2026
5.0
CVSS v3.1
Official Description
The ohci_bus_start function in the USB OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via vectors related to multiple eof_timers.
Technical Analysis
CVE-2016-2391 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.0.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (14)
→
http://www.openwall.com/lists/oss-security/2016/02/16/2Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/83263Third Party Advisory · VDB Entry
→
http://www.ubuntu.com/usn/USN-2974-1Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1304794Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List · Third Party Advisory
→
https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg03374.htmlPatch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/02/16/2Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/83263Third Party Advisory · VDB Entry
→
http://www.ubuntu.com/usn/USN-2974-1Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1304794Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing List · Third Party Advisory
→
https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg03374.htmlPatch · Third Party Advisory
Quick Facts
CVE IDCVE-2016-2391
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
Affected3 vendor(s)
PublishedJun 16, 2016
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-2391 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.