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Vulnerability record · CVE-2013-7439 · published 16 April 2015

CVE-2013-7439: X.org libx11 vulnerability

XX.Org · Libx11

Multiple off-by-one errors in the (1) MakeBigReq and (2) SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allow remote attackers to have unspecified impact via a crafted request, which triggers a buffer overflow.

7.5 CVSS 2.0 High EPSS 4.3% · top 9.3% CWE-189 · CWE-189
7.5CVSS 2.0 base score
4.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

Multiple off-by-one errors in the (1) MakeBigReq and (2) SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allow remote attackers to have unspecified impact via a crafted request, which triggers a buffer overflow.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.x.org/archives/xorg-announce/2015-April/002561.html PatchVendor Advisory
http://seclists.org/oss-sec/2015/q2/81 Third Party AdvisoryVDB Entry
http://www.debian.org/security/2015/dsa-3224 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.securityfocus.com/bid/73962 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-2568-1 Third Party Advisory
https://bugs.freedesktop.org/show_bug.cgi?id=56508 Issue Tracking
http://lists.x.org/archives/xorg-announce/2015-April/002561.html PatchVendor Advisory
http://seclists.org/oss-sec/2015/q2/81 Third Party AdvisoryVDB Entry
http://www.debian.org/security/2015/dsa-3224 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
http://www.securityfocus.com/bid/73962 Third Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-2568-1 Third Party Advisory
https://bugs.freedesktop.org/show_bug.cgi?id=56508 Issue Tracking

Track CVE-2013-7439 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2013-7439), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.