What’s Vulnerable › Vulnerabilities

CVE-2016-3961

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-04-15 · updated 2026-06-17
• Weakness: CWE-20

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 15.10, 16.04
• xen: through 4.5.3

References

• http://www.debian.org/security/2016/dsa-3607
• http://www.securityfocus.com/bid/86068
• http://www.securitytracker.com/id/1035569
• http://www.ubuntu.com/usn/USN-3001-1
• http://www.ubuntu.com/usn/USN-3002-1
• http://www.ubuntu.com/usn/USN-3003-1
• http://www.ubuntu.com/usn/USN-3004-1
• http://www.ubuntu.com/usn/USN-3005-1
• http://www.ubuntu.com/usn/USN-3006-1
• http://www.ubuntu.com/usn/USN-3007-1
• http://www.ubuntu.com/usn/USN-3049-1
• http://www.ubuntu.com/usn/USN-3050-1

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