CVE-2016-3961

MEDIUMNVD 5.55.5—

5.5

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 31.3%
KEV: Not listed

Published

April 15, 2016

Last Modified

May 6, 2026

References (28)

cve@mitrehttp://www.debian.org/security/2016/dsa-3607
cve@mitrehttp://www.securityfocus.com/bid/86068
cve@mitrehttp://www.securitytracker.com/id/1035569
cve@mitrehttp://www.ubuntu.com/usn/USN-3001-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3002-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3003-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3004-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3005-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3006-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3007-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3049-1
cve@mitrehttp://www.ubuntu.com/usn/USN-3050-1
cve@mitrehttp://xenbits.xen.org/xsa/advisory-174.html
cve@mitrehttp://xenbits.xen.org/xsa/xsa174.patch
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3607

Patch Availability(11)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-4.2.0-38-generic (4.2.0-38.45) @ wily	2026-05-22	ubuntu
ubuntu	linux-image-3.13.0-101-generic (3.13.0-101.148~precise1) @ precise	2026-05-22	ubuntu
ubuntu	linux-image-extra-3.13.0-101-generic (3.13.0-101.148) @ trusty	2026-05-22	ubuntu
ubuntu	linux-image-extra-3.19.0-61-generic (3.19.0-61.69~14.04.1) @ trusty	2026-05-22	ubuntu
ubuntu	linux-image-4.4.0-1012-raspi2 (4.4.0-1012.16) @ xenial	2026-05-22	ubuntu
ubuntu	linux-image-3.2.0-1485-omap4 (3.2.0-1485.112) @ precise	2026-05-22	ubuntu
ubuntu	linux-image-extra-4.4.0-24-generic (4.4.0-24.43~14.04.1) @ trusty	2026-05-22	ubuntu
ubuntu	linux-image-extra-4.4.0-24-generic (4.4.0-24.43) @ xenial	2026-05-22	ubuntu
ubuntu	linux-image-3.2.0-107-generic (3.2.0-107.148) @ precise	2026-05-22	ubuntu
ubuntu	linux-image-extra-4.2.0-38-generic (4.2.0-38.45~14.04.1) @ trusty	2026-05-22	ubuntu
ubuntu	linux-image-4.2.0-1031-raspi2 (4.2.0-1031.41) @ wily	2026-05-22	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(11)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 21:29 UTCOSV refresh
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore

Frequently asked(5)

What is CVE-2016-3961?

CVE-2016-3961 is a medium vulnerability published on April 15, 2016. Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.

When was CVE-2016-3961 disclosed?

CVE-2016-3961 was first published in the National Vulnerability Database on April 15, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-3961 actively exploited?

CVE-2016-3961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-3961?

CVE-2016-3961 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2016-3961?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-3961, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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