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Fencer Intel
medium 5.0

CVE-2015-8317 json

The xmlParseXMLDecl function in parser.c in libxml2 before 2.9.3 allows context-dependent attackers to obtain sensitive information via an…

published 2015-12-15 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-8201

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.9%
EPSS 5.9% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

The xmlParseXMLDecl function in parser.c in libxml2 before 2.9.3 allows context-dependent attackers to obtain sensitive information via an (1) unterminated encoding value or (2) incomplete XML declaration in XML data, which triggers an out-of-bounds heap read.

Patch / fix

  • libxml2 Debian 14, Debian 13, Debian 12 2.9.2+zdfsg1-4

debian advisories DEBIAN-CVE-2015-8317

  • libxml2 Ubuntu 14.04 LTS 2.9.1+dfsg1-3ubuntu4.6

ubuntu advisories UBUNTU-CVE-2015-8317

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

  • libxml2 RHEL 7 2.9.1-6.el7_2.2
  • libxml2-python RHEL 7 2.9.1-6.el7_2.2
  • libxml2 RHEL 6 2.7.6-20.el6_7.1
  • libxml2-python RHEL 6 2.7.6-20.el6_7.1

red hat advisories RHSA-2015:2550RHSA-2015:2549

  • libxml2 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 2.9.1-13.1
  • python-libxml2 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +3 more 2.9.1-13.1
  • libxml2 SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 2.7.6-0.34.1
  • libxml2-python SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +4 more 2.7.6-0.34.4

suse advisories SUSE-SU-2016:0049-1SUSE-SU-2016:0030-1

  • rubygem-nokogiri openSUSE Tumbleweed 1.18.9-1.4
  • rubygem-nokogiri openSUSE Tumbleweed 1.18.2-1.1
  • rubygem-nokogiri openSUSE Tumbleweed 1.15.5-1.5
  • rubygem-nokogiri openSUSE Tumbleweed 1.6.8.1-1.3
  • rubygem-nokogiri openSUSE Tumbleweed 1.13.3-1.1
  • ruby3.2-rubygem-nokogiri openSUSE Tumbleweed 1.13.9-1.7

opensuse advisories openSUSE-SU-2026:10356-1openSUSE-SU-2025:14697-1openSUSE-SU-2024:14174-1openSUSE-SU-2024:10549-1openSUSE-SU-2024:11912-1openSUSE-SU-2024:13165-1

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-2015-8317 updated cvss 4.3

libxml2: Out-of-bounds heap read when parsing file with unfinished xml declaration

  • Red Hat Enterprise Linux 5 libxml2 Red Hat JBoss Enterprise Web Server 2 libxml2
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) libxml2 2.9.1-6.el7_2.2, libxml2-python 2.9.1-6.el7_2.2 Red Hat Enterprise Linux Client Optional (v. 7) libxml2-devel 2.9.1-6.el7_2.2, libxml2-static 2.9.1-6.el7_2.2, libxml2-debuginfo 2.9.1-6.el7_2.2 Red Hat Enterprise Linux ComputeNode (v. 7) libxml2 2.9.1-6.el7_2.2, libxml2-python 2.9.1-6.el7_2.2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libxml2-devel 2.9.1-6.el7_2.2, libxml2-static 2.9.1-6.el7_2.2, libxml2-debuginfo 2.9.1-6.el7_2.2
    fixed: vendor fix RHSA-2015:2550
  • Red Hat Enterprise Linux Desktop (v. 6) libxml2 2.7.6-20.el6_7.1, libxml2-python 2.7.6-20.el6_7.1 Red Hat Enterprise Linux Desktop Optional (v. 6) libxml2-devel 2.7.6-20.el6_7.1, libxml2-static 2.7.6-20.el6_7.1, libxml2-debuginfo 2.7.6-20.el6_7.1 Red Hat Enterprise Linux HPC Node (v. 6) libxml2 2.7.6-20.el6_7.1, libxml2-python 2.7.6-20.el6_7.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) libxml2-devel 2.7.6-20.el6_7.1, libxml2-static 2.7.6-20.el6_7.1, libxml2-debuginfo 2.7.6-20.el6_7.1 Red Hat Enterprise Linux Server (v. 6) libxml2 2.7.6-20.el6_7.1, libxml2-python 2.7.6-20.el6_7.1
    fixed: vendor fix RHSA-2015:2549
  • Red Hat Enterprise Linux Server (v. 7) libxml2 2.9.1-6.el7_2.2, libxml2-python 2.9.1-6.el7_2.2
    fixed: vendor fix RHSA-2015:2550
  • Red Hat Enterprise Linux Server Optional (v. 6) libxml2-static 2.7.6-20.el6_7.1, libxml2-debuginfo 2.7.6-20.el6_7.1
    fixed: vendor fix RHSA-2015:2549
  • Red Hat Enterprise Linux Server Optional (v. 7) libxml2-static 2.9.1-6.el7_2.2, libxml2-debuginfo 2.9.1-6.el7_2.2
    fixed: vendor fix RHSA-2015:2550
  • Red Hat Enterprise Linux Workstation (v. 6) libxml2 2.7.6-20.el6_7.1, libxml2-python 2.7.6-20.el6_7.1
    fixed: vendor fix RHSA-2015:2549
  • Red Hat Enterprise Linux Workstation (v. 7) libxml2 2.9.1-6.el7_2.2, libxml2-python 2.9.1-6.el7_2.2
    fixed: vendor fix RHSA-2015:2550
show 3 more
  • Red Hat Enterprise Linux Workstation Optional (v. 6) libxml2-static 2.7.6-20.el6_7.1, libxml2-debuginfo 2.7.6-20.el6_7.1
    fixed: vendor fix RHSA-2015:2549
  • Red Hat Enterprise Linux Workstation Optional (v. 7) libxml2-static 2.9.1-6.el7_2.2, libxml2-debuginfo 2.9.1-6.el7_2.2
    fixed: vendor fix RHSA-2015:2550
  • Red Hat JBoss Web Server 3.0
    fixed: vendor fix RHSA-2016:1089

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

5.86% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1281930 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.gnome.org https://bugzilla.gnome.org/show_bug.cgi?id=751631 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

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.