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CVE-2013-1991

23
FAUCET Score

CVE-2013-1991 is an integer overflow vulnerability affecting X.org libXxf86dga versions 1.1.3 and earlier. This flaw allows X servers to trigger insufficient memory allocation and a subsequent buffer overflow through the XDGAQueryModes and XDGASetMode functions. With a CVSS score of 6.8, it presents a medium severity risk, potentially leading to partial confidentiality, integrity, and availability impacts with medium attack complexity and no authentication required. There is no evidence of active exploitation, nor are there public exploit modules available in Metasploit, Nuclei, or ExploitDB. Community discussion is minimal, with only two mentions.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.3CPE matchmatch criteria
cpe:2.3:a:x:libxxf86dga:*:*:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:x:libxxf86dga:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:x:libxxf86dga:1.0.2:*:*:*:*:*:*:*
1.0.99.1CPE matchmatch criteria
cpe:2.3:a:x:libxxf86dga:1.0.99.1:*:*:*:*:*:*:*
1.0.99.2CPE matchmatch criteria
cpe:2.3:a:x:libxxf86dga:1.0.99.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.26%
Probability of exploitation in next 30 days
EPSS Percentile
66.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0126 is in the 34th percentile among its peer group of 19,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (23)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libdmx-0:1.1.3-3.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libX11-0:1.6.0-2.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxcb-0:1.9.1-2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXcursor-0:1.1.14-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXext-0:1.3.2-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXfixes-0:5.0.1-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXi-0:1.7.2-2.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXinerama-0:1.1.3-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXp-0:1.0.2-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXrandr-0:1.4.1-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXrender-0:0.9.8-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXres-0:1.0.7-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXt-0:1.1.4-6.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXtst-0:1.2.2-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXv-0:1.0.9-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXvMC-0:1.0.8-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXxf86dga-0:1.1.4-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXxf86vm-0:1.1.3-2.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xcb-proto-0:1.8-3.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xkeyboard-config-0:2.11-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xorg-x11-proto-devel-0:7.7-9.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xorg-x11-xtrans-devel-0:1.3.4-1.el6
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libXxf86dga

Vendor Advisories (1)

redhatCVE-2013-1991Moderate

libXxf86dga: Multiple integer overflows leading to heap-based buffer overflows

May 23, 2013

References

lists.fedoraproject.org / pipermail/package-announce/2013-May/106870.html
debian.org / security/2013/dsa-2690
openwall.com / lists/oss-security/2013/05/23/3
ubuntu.com / usn/USN-1869-1
x.org / wiki/Development/Security/Advisory-2013-05-23
Vendor Advisory