CVE-2013-7439

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.

Published: 2015-04-16 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-7439 is rated Moderate Risk (59.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.14%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-7439

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 1.88% 2.14% +0.26%
2 2025-12-28 2.14% 1.88% -0.26%
3 2025-12-27 — 2.14% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-7439

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2013-7439

OS Trackers for CVE-2013-7439

vendor priority summary link
debian not yet assigned CVE-2013-7439 not yet assigned priority: Debian including 1 source packages (libx11), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-7439
redhat low — https://access.redhat.com/security/cve/CVE-2013-7439
ubuntu medium CVE-2013-7439 medium priority: Ubuntu including 2 source packages (libx11, libxrender), 10 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 4, ignored 2, needs-triage 2, not-affected 2. https://ubuntu.com/security/CVE-2013-7439

Affected software / configurations for CVE-2013-7439

Vendor Product Version Raw CPE
x.org libx11 1.0.1 cpe:2.3:a:x.org:libx11:1.0.1:*:*:*:*:*:*:*
x.org libx11 1.0.2 cpe:2.3:a:x.org:libx11:1.0.2:*:*:*:*:*:*:*
x.org libx11 1.0.3 cpe:2.3:a:x.org:libx11:1.0.3:*:*:*:*:*:*:*
x.org libx11 1.1 cpe:2.3:a:x.org:libx11:1.1:*:*:*:*:*:*:*
x.org libx11 1.1 cpe:2.3:a:x.org:libx11:1.1:rc1:*:*:*:*:*:*
x.org libx11 1.1 cpe:2.3:a:x.org:libx11:1.1:rc2:*:*:*:*:*:*
x.org libx11 1.1.4 cpe:2.3:a:x.org:libx11:1.1.4:*:*:*:*:*:*:*
x.org libx11 1.1.5 cpe:2.3:a:x.org:libx11:1.1.5:*:*:*:*:*:*:*
x.org libx11 1.1.6 cpe:2.3:a:x.org:libx11:1.1.6:*:*:*:*:*:*:*
x.org libx11 1.1.99.1 cpe:2.3:a:x.org:libx11:1.1.99.1:*:*:*:*:*:*:*
x.org libx11 1.1.99.2 cpe:2.3:a:x.org:libx11:1.1.99.2:*:*:*:*:*:*:*
x.org libx11 1.2 cpe:2.3:a:x.org:libx11:1.2:*:*:*:*:*:*:*
x.org libx11 1.2.1 cpe:2.3:a:x.org:libx11:1.2.1:*:*:*:*:*:*:*
x.org libx11 1.2.2 cpe:2.3:a:x.org:libx11:1.2.2:*:*:*:*:*:*:*
x.org libx11 1.3 cpe:2.3:a:x.org:libx11:1.3:*:*:*:*:*:*:*
x.org libx11 1.3.1 cpe:2.3:a:x.org:libx11:1.3.1:*:*:*:*:*:*:*
x.org libx11 1.3.2 cpe:2.3:a:x.org:libx11:1.3.2:*:*:*:*:*:*:*
x.org libx11 1.3.3 cpe:2.3:a:x.org:libx11:1.3.3:*:*:*:*:*:*:*
x.org libx11 1.3.4 cpe:2.3:a:x.org:libx11:1.3.4:*:*:*:*:*:*:*
x.org libx11 1.3.5 cpe:2.3:a:x.org:libx11:1.3.5:*:*:*:*:*:*:*
x.org libx11 1.3.6 cpe:2.3:a:x.org:libx11:1.3.6:*:*:*:*:*:*:*
x.org libx11 1.3.99.901 cpe:2.3:a:x.org:libx11:1.3.99.901:*:*:*:*:*:*:*
x.org libx11 1.3.99.902 cpe:2.3:a:x.org:libx11:1.3.99.902:*:*:*:*:*:*:*
x.org libx11 1.3.99.903 cpe:2.3:a:x.org:libx11:1.3.99.903:*:*:*:*:*:*:*
x.org libx11 1.4.0 cpe:2.3:a:x.org:libx11:1.4.0:*:*:*:*:*:*:*
x.org libx11 1.4.1 cpe:2.3:a:x.org:libx11:1.4.1:*:*:*:*:*:*:*
x.org libx11 1.4.2 cpe:2.3:a:x.org:libx11:1.4.2:*:*:*:*:*:*:*
x.org libx11 1.4.3 cpe:2.3:a:x.org:libx11:1.4.3:*:*:*:*:*:*:*
x.org libx11 1.4.4 cpe:2.3:a:x.org:libx11:1.4.4:*:*:*:*:*:*:*
x.org libx11 1.4.99.901 cpe:2.3:a:x.org:libx11:1.4.99.901:*:*:*:*:*:*:*
x.org libx11 1.4.99.902 cpe:2.3:a:x.org:libx11:1.4.99.902:*:*:*:*:*:*:*
x.org libx11 1.5.0 cpe:2.3:a:x.org:libx11:1.5.0:*:*:*:*:*:*:*
x.org libx11 1.5.99.901 cpe:2.3:a:x.org:libx11:1.5.99.901:*:*:*:*:*:*:*
x.org libx11 1.5.99.902 cpe:2.3:a:x.org:libx11:1.5.99.902:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.10 cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
x.org x11 6.0 cpe:2.3:a:x.org:x11:6.0:*:*:*:*:*:*:*
x.org x11 6.1 cpe:2.3:a:x.org:x11:6.1:*:*:*:*:*:*:*
x.org x11 6.3 cpe:2.3:a:x.org:x11:6.3:*:*:*:*:*:*:*
x.org x11 6.4 cpe:2.3:a:x.org:x11:6.4:*:*:*:*:*:*:*
x.org x11 6.5.1 cpe:2.3:a:x.org:x11:6.5.1:*:*:*:*:*:*:*
x.org x11 6.6 cpe:2.3:a:x.org:x11:6.6:*:*:*:*:*:*:*
x.org x11 6.7 cpe:2.3:a:x.org:x11:6.7:*:*:*:*:*:*:*
x.org x11 6.8.0 cpe:2.3:a:x.org:x11:6.8.0:*:*:*:*:*:*:*
x.org x11 6.8.1 cpe:2.3:a:x.org:x11:6.8.1:*:*:*:*:*:*:*
x.org x11 6.8.2 cpe:2.3:a:x.org:x11:6.8.2:*:*:*:*:*:*:*
x.org x11 6.9 cpe:2.3:a:x.org:x11:6.9:*:*:*:*:*:*:*

References for CVE-2013-7439

cvelogic Threat Intelligence