Is CVE-2013-1991 in the CISA KEV catalog?

No. CVE-2013-1991 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-1991?

CVE-2013-1991 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2013-1991?

CVE-2013-1991 has an EPSS score of 1.26% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-1991?

Upgrade libxxf86dga on debian 11 to 2:1.1.3-2+deb7u1 or later.

CVE & CISA-KEV Catalog

CVE-2013-1991

MEDIUM

6.8

CVSS v2

NVD

Description

Multiple integer overflows in X.org libXxf86dga 1.1.3 and earlier allow X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to the (1) XDGAQueryModes and (2) XDGASetMode functions.

CWE-189

How to fix

Remediation Available

libxxf86dgaDebian

Fixed in:2:1.1.3-2+deb7u1CVE-2013-1991

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.26%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Vendor Advisory1

x.org

Other references4

Related Vulnerabilities

Other CWE-189 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-1538	High	10.0	99%	-	-
CVE-2006-3747	High	7.6	96%	-	Fix
CVE-2007-0071	High	9.3	93%	-	-
CVE-2015-3829	High	10.0	90%	-	-
CVE-2015-3864	High	10.0	87%	-	-
CVE-2015-1539	High	10.0	86%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.