Is CVE-2013-6393 being actively exploited?

CVE-2013-6393 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-6393?

CVE-2013-6393 has a CVSS 2.0 base score of 6.8 (MEDIUM).

CVE-2013-6393

MEDIUM · CVSS 6.8EPSS 7.4%EU EUVD

The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.

Key facts

CVSS score: 6.8 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-119
EPSS score: 7.4% (94th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2020-0633)
Published: February 6, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-0633 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
opensuse / leap
opensuse / opensuse
opensuse / opensuse
opensuse / opensuse
pyyaml / libyaml
pyyaml / libyaml
pyyaml / libyaml
pyyaml / libyaml
pyyaml / libyaml
redhat / openstack
redhat / openstack

References

http://advisories.mageia.org/MGASA-2014-0040.html(Third Party Advisory)
http://archives.neohapsis.com/archives/bugtraq/2014-04/0134.html(Broken Link)
http://archives.neohapsis.com/archives/bugtraq/2014-10/0103.html(Broken Link)
http://lists.opensuse.org/opensuse-updates/2014-02/msg00064.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2014-02/msg00065.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2015-02/msg00078.html(Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2016-04/msg00050.html(Third Party Advisory)
http://osvdb.org/102716
http://rhn.redhat.com/errata/RHSA-2014-0353.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2014-0354.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2014-0355.html(Third Party Advisory)
http://www.debian.org/security/2014/dsa-2850(Third Party Advisory)
http://www.debian.org/security/2014/dsa-2870(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2015:060(Third Party Advisory)
http://www.securityfocus.com/bid/65258(Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/USN-2098-1(Third Party Advisory)
https://bitbucket.org/xi/libyaml/commits/tag/0.1.5(Issue Tracking)
https://bugzilla.redhat.com/attachment.cgi?id=847926&action=diff(Issue Tracking)
https://bugzilla.redhat.com/show_bug.cgi?id=1033990(Issue Tracking, Patch)
https://puppet.com/security/cve/cve-2013-6393
https://support.apple.com/kb/HT6536(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain