CVE & CISA-KEV Catalog

CVE-2016-2391

MEDIUM
5.0
CVSS v3
NVD

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available
qemuDebian
Fixed in:1:2.6+dfsg-1CVE-2016-2391
Fixed in:1:2.6+dfsg-1CVE-2016-2391
Fixed in:1:2.6+dfsg-1CVE-2016-2391
Fixed in:1:2.6+dfsg-1CVE-2016-2391
qemuUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-systemUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-aarch64Ubuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-armUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-mipsUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-miscUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-ppcUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-s390xUbuntu
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-sparcUbuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1
qemu-system-x86Ubuntu
Fixed in:2.0.0+dfsg-2ubuntu1.24USN-2974-1
Fixed in:1:2.5+dfsg-5ubuntu10.1USN-2974-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
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

Exploit Intelligence

0.40%probability of exploitation in 30 days
32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Other references1

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-21758High7.592%-Fix
CVE-2023-21547High7.588%-Fix
CVE-2014-3470Medium4.386%-Fix
CVE-2021-44224High8.282%-Fix
CVE-2016-0742High7.582%-Fix
CVE-2009-1386Medium5.080%-Fix
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CVE-2016-2391 severity badge

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.