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Fencer Intel
critical 9.8

CVE-2016-0718 in the critical feed json

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input docu…

published 2016-05-26 10 y ago modified 2026-10-08 31 d ago also EUVD-2016-0749

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.3%
EPSS 13.3% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.

Patch / fix

  • mozilla firefox 48.0
  • libexpat_project libexpat 2.2.0
  • mcafee policy_auditor 6.5.1
  • python python 2.7.15, 3.3.7, 3.4.7, 3.5.4, 3.6.2
  • expat Debian 14, Debian 13, Debian 12 2.1.1-2

debian advisories DEBIAN-CVE-2016-0718

  • expat Ubuntu 14.04 LTS 2.1.0-4ubuntu1.2
  • expat Ubuntu 16.04 LTS 2.1.0-7ubuntu0.16.04.1
  • firefox Ubuntu 14.04 LTS 48.0+build2-0ubuntu0.14.04.1
  • firefox Ubuntu 16.04 LTS 48.0+build2-0ubuntu0.16.04.1
  • libxmltok Ubuntu Pro 16.04 LTS 1.2-3ubuntu0.16.04.1~esm2
  • libxmltok Ubuntu Pro 18.04 LTS 1.2-4ubuntu0.18.04.1~esm4
  • libxmltok Ubuntu Pro 20.04 LTS 1.2-4ubuntu0.20.04.1~esm4
  • libxmltok Ubuntu Pro 22.04 LTS 1.2-4ubuntu0.22.04.1~esm4

ubuntu advisories UBUNTU-CVE-2016-0718

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

  • expat RHEL 6 2.0.1-13.el6_8
  • expat RHEL 7 2.1.0-10.el7_3

red hat advisories RHSA-2016:2824

  • expat Linux Micro 6.0 2.8.5-159998.1.1
  • expat SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +10 more 2.8.5-150400.3.40.1
  • python3 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +18 more 3.4.10-25.39.3
  • python3-base SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +18 more 3.4.10-25.39.2
  • expat Studio Onsite 1.3, SLES for SAP 11 SP4, SLES 11 SP4 +1 more 2.0.1-88.38.1
  • expat SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 2.1.0-17.1
  • expat SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.8.5-21.55.1

suse advisories SUSE-SU-2026:24323-1SUSE-SU-2026:4623-1SUSE-SU-2026:4615-1SUSE-SU-2020:0497-1SUSE-SU-2016:1512-1SUSE-SU-2016:1508-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • expat openSUSE Tumbleweed 2.2.0-3.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10077-1

  • expat Alpine 3.4 2.1.1-r1

alpine advisories ALPINE-CVE-2016-0718

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2016-0718 updated cvss 6.8

expat: Out-of-bounds heap read on crafted input causing crash

  • Red Hat Enterprise Linux 5 expat, xmlrpc-c Red Hat Enterprise Linux 6 compat-expat1 Red Hat JBoss Enterprise Application Platform 6 expat Red Hat JBoss Enterprise Web Server 2 expat Red Hat JBoss Enterprise Web Server 3 expat
    affected: no fix planned “Will not fix”
  • Red Hat Directory Server 8 expat
    under investigation
  • Red Hat Enterprise Linux Client (v. 7) expat 2.1.0-10.el7_3 Red Hat Enterprise Linux Client Optional (v. 7) expat-devel 2.1.0-10.el7_3, expat-static 2.1.0-10.el7_3, expat-debuginfo 2.1.0-10.el7_3 Red Hat Enterprise Linux ComputeNode (v. 7) expat 2.1.0-10.el7_3 Red Hat Enterprise Linux ComputeNode Optional (v. 7) expat-devel 2.1.0-10.el7_3, expat-static 2.1.0-10.el7_3, expat-debuginfo 2.1.0-10.el7_3 Red Hat Enterprise Linux Desktop (v. 6) expat 2.0.1-13.el6_8 Red Hat Enterprise Linux Desktop Optional (v. 6) expat-devel 2.0.1-13.el6_8, expat-debuginfo 2.0.1-13.el6_8
    +8 more products
    Red Hat Enterprise Linux HPC Node (v. 6) expat 2.0.1-13.el6_8 Red Hat Enterprise Linux HPC Node Optional (v. 6) expat-devel 2.0.1-13.el6_8, expat-debuginfo 2.0.1-13.el6_8 Red Hat Enterprise Linux Server (v. 6) expat 2.0.1-13.el6_8 Red Hat Enterprise Linux Server (v. 7) expat 2.1.0-10.el7_3 Red Hat Enterprise Linux Server Optional (v. 7) expat-static 2.1.0-10.el7_3, expat-debuginfo 2.1.0-10.el7_3 Red Hat Enterprise Linux Workstation (v. 6) expat 2.0.1-13.el6_8 Red Hat Enterprise Linux Workstation (v. 7) expat 2.1.0-10.el7_3 Red Hat Enterprise Linux Workstation Optional (v. 7) expat-static 2.1.0-10.el7_3, expat-debuginfo 2.1.0-10.el7_3
    fixed: vendor fix RHSA-2016:2824
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2018:2486
  • Red Hat Enterprise Linux 5 firefox, xulrunner, thunderbird Red Hat Enterprise Linux 6 firefox, xulrunner, thunderbird Red Hat Enterprise Linux 7 firefox, xulrunner, thunderbird
    not affected: vulnerable code not present

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
31 d ago

Exploit prediction

13.26% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.