CVE-2013-1996

X.org libFS 1.0.4 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to an unexpected sign extension in the FSOpenServer function.

Published: 2013-06-15 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1996 is rated Moderate Risk (50.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.26%). 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-2013-1996

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 0.68% 1.26% +0.58%
2 2025-07-13 0.55% 0.68% +0.14%
3 2025-03-30 — 0.55% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1996

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2013-1996

OS Trackers for CVE-2013-1996

vendor priority summary link
debian not yet assigned CVE-2013-1996 not yet assigned priority: Debian including 1 source packages (libfs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-1996
gentoo high CVE-2013-1996: 1 GLSA(s) (201405-07), 1 atom(s) (x11-base/xorg-server); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1996
redhat medium — https://access.redhat.com/security/cve/CVE-2013-1996
ubuntu medium CVE-2013-1996 medium priority: Ubuntu including 1 source packages (libfs), 5 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 3, ignored 1, pending 1. https://ubuntu.com/security/CVE-2013-1996

Affected software / configurations for CVE-2013-1996

Vendor Product Version Raw CPE
x libfs <= 1.0.4 cpe:2.3:a:x:libfs:*:*:*:*:*:*:*:*
x libfs 1.0.1 cpe:2.3:a:x:libfs:1.0.1:*:*:*:*:*:*:*
x libfs 1.0.2 cpe:2.3:a:x:libfs:1.0.2:*:*:*:*:*:*:*
x libfs 1.0.3 cpe:2.3:a:x:libfs:1.0.3:*:*:*:*:*:*:*

References for CVE-2013-1996

cvelogic Threat Intelligence