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CVE-2017-18926

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15...

7.1 HighFix available

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
High

Exploit likelihood

3.12%Up 0.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.1

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
CVE-2017-18926
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS 2.0
5.8 MediumAV:N/AC:M/Au:N/C:N/I:P/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
CVE-2017-18926
Updated
2026-11-02
EUVDEUVD-2017-10015 No score

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
EUVD-2017-10015
Updated
2026-11-03
GitHub AdvisoriesGHSA-p2vv-g8rx-7jqj 7.1

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15...

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
GHSA-p2vv-g8rx-7jqj
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness
CWE-787
Updated
2026-11-02
OSVAZL-45321 7.1

CVE-2017-18926 affecting package raptor2 2.0.15-29

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
AZL-45321
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-05
OSV 7.1

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
CVE-2017-18926
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-02
Show 13 moreShow less
OSVDEBIAN-CVE-2017-18926 7.1

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
DEBIAN-CVE-2017-18926
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-02
OSVRHSA-2021:1842 6.5

Red Hat Security Advisory: raptor2 security and bug fix update

Record
RHSA-2021:1842
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRLSA-2021:1842 7.1

Moderate: raptor2 security and bug fix update

Raptor is the RDF Parser Toolkit for Redland that provides a set of standalone RDF parsers, generating triples from RDF/XML or N-Triples.

Security Fix(es):

  • raptor: heap-based buffer overflows due to an error in calculating the maximum nspace declarations for the XML writer (CVE-2017-18926)

  • raptor2: malformed input file can lead to a segfault due to an out of bounds array access in raptor_xml_writer_start_element_common (CVE-2020-25713)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.4 Release Notes linked from the References section.

Record
RLSA-2021:1842
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2017-18926 7.1

raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml).

Record
UBUNTU-CVE-2017-18926
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Updated
2026-11-02
OSVALSA-2021:1842 No score

Moderate: raptor2 security and bug fix update

Raptor is the RDF Parser Toolkit for Redland that provides a set of standalone RDF parsers, generating triples from RDF/XML or N-Triples.

Security Fix(es):

  • raptor: heap-based buffer overflows due to an error in calculating the maximum nspace declarations for the XML writer (CVE-2017-18926)

  • raptor2: malformed input file can lead to a segfault due to an out of bounds array access in raptor_xml_writer_start_element_common (CVE-2020-25713)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Record
ALSA-2021:1842
Updated
2026-11-02
OSVopenSUSE-SU-2020:1949-1 No score

Security update for raptor

This update for raptor fixes the following issues:

  • Fixed a heap overflow vulnerability (bsc#1178593, CVE-2017-18926).

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2020:1949-1
Updated
2026-11-02
OSVopenSUSE-SU-2020:1959-1 No score

Security update for raptor

This update for raptor fixes the following issues:

  • Fixed a heap overflow vulnerability (bsc#1178593, CVE-2017-18926).

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2020:1959-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11296-1 No score

libraptor-devel-2.0.15-3.8 on GA media

These are all security issues fixed in the libraptor-devel-2.0.15-3.8 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11296-1
Updated
2026-11-02
OSVSUSE-SU-2020:3350-1 No score

Security update for raptor

This update for raptor fixes the following issues:

  • Fixed a heap overflow vulnerability (bsc#1178593, CVE-2017-18926).
Record
SUSE-SU-2020:3350-1
Updated
2026-11-02
OSVSUSE-SU-2020:3351-1 No score

Security update for raptor

This update for raptor fixes the following issues:

  • Fixed a heap overflow vulnerability (bsc#1178593, CVE-2017-18926).
  • Update raptor to version 2.0.15
    • Made several fixes to Turtle / N-Triples family of parsers and serializers
    • Added utility functions for re-entrant sorting of objects and sequences.
    • Made other fixes and improvements including fixing reported issues: 0000574, 0000575, 0000576, 0000577, 0000579, 0000581 and 0000584.
Record
SUSE-SU-2020:3351-1
Updated
2026-11-02
OSVSUSE-SU-2020:3352-1 No score

Security update for raptor

This update for raptor fixes the following issues:

  • Fixed a heap overflow vulnerability (bsc#1178593, CVE-2017-18926).
Record
SUSE-SU-2020:3352-1
Updated
2026-11-02
OSVUSN-4630-1 No score

raptor2 vulnerability

Hanno Böck discovered that Raptor incorrectly handled certain memory operations. If a user were tricked into opening a specially crafted document in an application linked against Raptor, an attacker could cause the application to crash, resulting in a denial of service, or possibly execute arbitrary code.

Record
USN-4630-1
Updated
2026-11-02
OSVUSN-7868-1 No score

raptor vulnerabilities

Hanno Böck discovered that Raptor incorrectly handled memory operations when processing certain input files. An attacker could use this issue to cause Raptor to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-18926)

Hanno Böck discovered that Raptor incorrectly handled memory operations when processing certain input files. An attacker could possibly use this issue to cause Raptor to crash, resulting in a denial of service. (CVE-2020-25713)

Record
USN-7868-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
raptor2
AlmaLinux:8
From an advisory covering 2 CVEs
before 2.0.15-16.el8
2.0.15-16.el8
raptor2-devel
AlmaLinux:8
From an advisory covering 2 CVEs
before 2.0.15-16.el8
2.0.15-16.el8
raptor2
Azure Linux:3
through 2.0.15-29 None known
raptor2
Debian:12
before 2.0.14-1.1
2.0.14-1.1
raptor2
Debian:13
before 2.0.14-1.1
2.0.14-1.1
raptor2
Debian:14
before 2.0.14-1.1
2.0.14-1.1
raptor2
Debian:9
before 2.0.14-1+deb9u1, plus listed versions
2.0.14-1
2.0.14-1+deb9u1
raptor2
Debian:10
before 2.0.14-1.1~deb10u1, plus listed versions
2.0.14-1
2.0.14-1.1~deb10u1
raptor2
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
Show 35 moreShow less
Affected packages
PackageAffectedFixed
raptor2-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2
Red Hat:enterprise_linux:8::crb
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2-debugsource
Red Hat:enterprise_linux:8::crb
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2-devel
Red Hat:enterprise_linux:8::crb
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor2
Rocky Linux:8
From an advisory covering 2 CVEs
before 0:2.0.15-16.el8
0:2.0.15-16.el8
raptor
SUSE:Linux Enterprise Module for Desktop Applications 15 SP1
before 2.0.15-3.3.1
2.0.15-3.3.1
raptor
SUSE:HPE Helion OpenStack 8
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:OpenStack Cloud 7
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:OpenStack Cloud 8
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:OpenStack Cloud 9
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:OpenStack Cloud Crowbar 8
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:OpenStack Cloud Crowbar 9
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server for SAP Applications 12 SP2
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Software Development Kit 12 SP5
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP2-LTSS
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP2-BCL
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP3-LTSS
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP3-BCL
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP4-LTSS
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server 12 SP5
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Workstation Extension 12 SP5
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Enterprise Storage 5
before 2.0.15-5.3.1
2.0.15-5.3.1
raptor
SUSE:Linux Enterprise Module for Desktop Applications 15 SP2
before 2.0.15-9.3.1
2.0.15-9.3.1
raptor2
Ubuntu:16.04:LTS
before 2.0.14-1ubuntu0.16.04.1, plus listed versions
2.0.14-1
2.0.14-1ubuntu0.16.04.1
raptor
Ubuntu:Pro:16.04:LTS
before 1.4.21-11ubuntu0.1~esm1, plus listed versions
1.4.21-11
1.4.21-11ubuntu0.1~esm1
raptor2
Ubuntu:18.04:LTS
before 2.0.14-1ubuntu0.18.04.1, plus listed versions
2.0.14-1build1
2.0.14-1ubuntu0.18.04.1
raptor2
Ubuntu:20.04:LTS
before 2.0.15-0ubuntu1.20.04.1, plus listed versions
2.0.15-0ubuntu1
2.0.15-0ubuntu1.20.04.1
raptor2
Ubuntu:22.04:LTS
before 2.0.15-0ubuntu2
2.0.15-0ubuntu2
raptor
Ubuntu:Pro:16.04:LTS
From an advisory covering 2 CVEs
before 1.4.21-11ubuntu0.1~esm1, plus listed versions
1.4.21-11
1.4.21-11ubuntu0.1~esm1
raptor
openSUSE:Leap 15.2
before 2.0.15-lp152.4.3.1
2.0.15-lp152.4.3.1
raptor
openSUSE:Leap 15.1
before 2.0.15-lp151.3.3.1
2.0.15-lp151.3.3.1

History

History
RecordedChangedSources
affected
factsOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-18926 is a high vulnerability (CVSS 7.1) in Librdf Raptor Rdf Syntax Library, published November 6, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.12%, the 87th percentile. Fixed in raptor2 2.0.14-1.1.

References

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