HIGH

CVE-2017-18926

CVSS v3

7.1

HIGH

EPSS Score

3.1 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

raptor2AlmaLinux:8all versions · fixed in 2.0.15-16.el8and 1 other package

Vendor advisories

CVE-2017-18926 Red Hat Product Security42 products fixed · 322 known affected
raptor: heap-based buffer overflows due to an error in calculating the maximum nspace declarations for the XML writer
autocorr-af as a component of Red Hat Enterprise Linux 6 · autocorr-bg as a component of Red Hat Enterprise Linux 6 · autocorr-ca as a component of Red Hat Enterprise Linux 6
RHSA-2021:1842 Red Hat Product Security28 products fixed
Red Hat Security Advisory: raptor2 security and bug fix update

Full record on NVD

Description

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).

Technical details

Published: 2020-11-06

Frequently asked questions

What is CVE-2017-18926?

Is CVE-2017-18926 actively exploited?

Active exploitation of CVE-2017-18926 has not been confirmed. Its EPSS score was 3.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-18926?

CVE-2017-18926 has a CVSS v3 base score of 7.1 (HIGH severity).

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