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Fencer Intel
high 8.8

CVE-2016-3960 json

Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly…

published 2016-04-19 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-4969

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping.

Patch / fix

  • xen Debian 14, Debian 13, Debian 12 4.8.0~rc3-1

debian advisories DEBIAN-CVE-2016-3960

  • xen Ubuntu 14.04 LTS 4.4.2-0ubuntu0.14.04.6
  • xen Ubuntu 16.04 LTS 4.6.0-1ubuntu4.1

ubuntu advisories UBUNTU-CVE-2016-3960

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 4.2.5_21-27.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_07-37.1
  • xen SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 4.5.3_08-17.1
  • xen SLES for SAP 12, SLES 12-LTSS 4.4.4_04-22.22.2
  • xen SLES 11 SP2-LTSS 4.1.6_08-29.1

suse advisories SUSE-SU-2016:2725-1SUSE-SU-2016:2533-1SUSE-SU-2016:2528-1SUSE-SU-2016:2100-1SUSE-SU-2016:2093-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-3960 updated cvss 5.8

xen: x86 shadow pagetables: address width overflow (XSA-173)

  • Red Hat Enterprise Linux 5 xen
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.