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CVE-2014-8091

15
FAUCET Score

CVE-2014-8091 describes a denial-of-service vulnerability in X.Org X Window System (X11R5) and X.Org Server versions prior to 1.16.3. This flaw occurs when using SUN-DES-1 authentication, where the server fails to check the return value of a malloc call, leading to a NULL pointer dereference and server crash upon receiving a crafted connection request. The vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity, requiring no authentication, and resulting in partial availability impact. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting it has not garnered significant attention from researchers or the public.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.16.2CPE matchmatch criteria
cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:a:x.org:x11:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.19%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0419 is in the 87th percentile among its peer group of 19,956 CVEs.

Social Chatter

No social media mentions found for this CVE.

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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xorg-x11-server-0:1.1.1-48.107.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xorg-x11-server-0:1.15.0-25.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: xorg-x11-server-0:1.15.0-7.el7_0.3
View patch
oraclevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2014-8091Moderate

xorg-x11-server: denial of service due to unchecked malloc in client authentication

Dec 9, 2014

References

advisories.mageia.org / MGASA-2014-0532.html
secunia.com / advisories/61947
secunia.com / advisories/62292
security.gentoo.org / glsa/201504-06
debian.org / security/2014/dsa-3095
mandriva.com / security/advisories
oracle.com / technetwork/topics/security/bulletinjan2015-2370101.html
oracle.com / technetwork/topics/security/bulletinoct2015-2511968.html
oracle.com / technetwork/topics/security/cpujul2015-2367936.html
Vendor Advisory
securityfocus.com / bid/71597
x.org / wiki/Development/Security/Advisory-2014-12-09
PatchVendor Advisory