CVE-2014-8091

X.Org X Window System (aka X11 and X) X11R5 and X.Org Server (aka xserver and xorg-server) before 1.16.3, when using SUN-DES-1 (Secure RPC) authentication credentials, does not check the return value of a malloc call, which allows remote attackers to cause a denial of service (NULL pointer dereference and server crash) via a crafted connection request.

Published: 2014-12-10 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-8091 is rated Moderate Risk (47.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.19%). 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-2014-8091

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 2026-06-15 4.84% 4.19% -0.65%
2 2026-03-08 6.31% 4.84% -1.47%
3 2025-03-30 — 6.31% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-8091

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2014-8091

OS Trackers for CVE-2014-8091

vendor priority summary link
debian not yet assigned CVE-2014-8091 not yet assigned priority: Debian including 1 source packages (xorg-server), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-8091
gentoo high CVE-2014-8091: 1 GLSA(s) (201504-06), 1 atom(s) (x11-base/xorg-server); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-8091
redhat medium — https://access.redhat.com/security/cve/CVE-2014-8091
ubuntu medium CVE-2014-8091 medium priority: Ubuntu including 6 source packages (nvidia-graphics-drivers-304, nvidia-graphics-drivers-304-updates, nvidia-graphics-drivers-331, nvidia-graphics-drivers-331-updates, xorg-server, xorg-server-lts-trusty), 30 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 21, DNE 7, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2014-8091

NVD evaluator notes for CVE-2014-8091

Comment: <a href="http://cwe.mitre.org/data/definitions/476.html">CWE-476: NULL Pointer Dereference</a>

Affected software / configurations for CVE-2014-8091

Vendor Product Version Raw CPE
x.org x_server <= 1.16.2 cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
x.org x11 5.0 cpe:2.3:a:x.org:x11:5.0:*:*:*:*:*:*:*

References for CVE-2014-8091

cvelogic Threat Intelligence