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CVE-2017-18926

25
FAUCET Score

CVE-2017-18926 describes a heap-based buffer overflow vulnerability in the Raptor RDF Syntax Library (versions 2.0.15 and earlier), specifically within the raptor_xml_writer_start_element_common function. This flaw, which can impact Debian and Fedora distributions, arises from miscalculating namespace declarations during XML writing. Rated 7.1 HIGH, it is remotely exploitable with low attack complexity and user interaction, potentially leading to high availability impact and low integrity impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.15CPE matchmatch criteria
cpe:2.3:a:librdf:raptor_rdf_syntax_library:2.0.15:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.08%
Probability of exploitation in next 30 days
EPSS Percentile
86.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0308 is in the 85th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: raptor2-0:2.0.15-16.el8
View patch

Vendor Advisories (1)

redhatCVE-2017-18926Moderate

raptor: heap-based buffer overflows due to an error in calculating the maximum nspace declarations for the XML writer

Jun 7, 2017

References

github.com / LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/11/msg00012.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/RD67AVORGQXORPWNYYUHCH6YPPT6CI4O
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/RVHFYQDMVEBICIL4DBAGRRLPUR4QYWMV
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WDZRNM45VPTQF2BKRWG4YRCHJGQ2L7NS
debian.org / security/2020/dsa-4785
Third Party Advisory
openwall.com / lists/oss-security/2017/06/07/1
ExploitMailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2020/11/13/1
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/11/13/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/11/14/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/11/16/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/11/16/3
Mailing ListThird Party Advisory