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Fencer Intel
medium 6.5

CVE-2013-4396 json

Use-after-free vulnerability in the doImageText function in dix/dixfonts.c in the xorg-server module before 1.14.4 in X.Org X11 allows remo…

published 2013-10-10 13 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4275

cvss
6.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Use-after-free vulnerability in the doImageText function in dix/dixfonts.c in the xorg-server module before 1.14.4 in X.Org X11 allows remote authenticated users to cause a denial of service (daemon crash) or possibly execute arbitrary code via a crafted ImageText request that triggers memory-allocation failure.

Patch / fix

  • xorg-server Debian 14, Debian 13, Debian 12 2:1.14.3-4

debian advisories DEBIAN-CVE-2013-4396

  • xorg-x11-server RHEL 5 1.1.1-48.101.el5_10.1
  • xorg-x11-server RHEL 6 1.13.0-11.1.el6_4.2
  • xorg-x11-server-sdk RHEL 5 1.1.1-48.101.el5_10.1
  • xorg-x11-server-Xdmx RHEL 5 1.1.1-48.101.el5_10.1
  • xorg-x11-server-Xdmx RHEL 6 1.13.0-11.1.el6_4.2
  • xorg-x11-server-Xorg RHEL 5 1.1.1-48.101.el5_10.1
  • xorg-x11-server-Xorg RHEL 6 1.13.0-11.1.el6_4.2
  • xorg-x11-server-Xvfb RHEL 5 1.1.1-48.101.el5_10.1

red hat advisories RHSA-2013:1426

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-4396 updated cvss 7.4

xorg-x11-server: use-after-free flaw when handling ImageText requests

  • Red Hat Enterprise Linux (v. 5 server) xorg-x11-server 1.1.1-48.101.el5_10.1, xorg-x11-server-sdk 1.1.1-48.101.el5_10.1, xorg-x11-server-Xdmx 1.1.1-48.101.el5_10.1, xorg-x11-server-Xorg 1.1.1-48.101.el5_10.1, xorg-x11-server-Xvfb 1.1.1-48.101.el5_10.1, xorg-x11-server-Xnest 1.1.1-48.101.el5_10.1, +2 more Red Hat Enterprise Linux Desktop (v. 5 client) xorg-x11-server 1.1.1-48.101.el5_10.1, xorg-x11-server-Xdmx 1.1.1-48.101.el5_10.1, xorg-x11-server-Xorg 1.1.1-48.101.el5_10.1, xorg-x11-server-Xvfb 1.1.1-48.101.el5_10.1, xorg-x11-server-Xnest 1.1.1-48.101.el5_10.1, xorg-x11-server-Xephyr 1.1.1-48.101.el5_10.1, +1 more Red Hat Enterprise Linux Desktop (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xorg 1.13.0-11.1.el6_4.2, xorg-x11-server-common 1.13.0-11.1.el6_4.2, xorg-x11-server-Xephyr 1.13.0-11.1.el6_4.2 Red Hat Enterprise Linux Desktop Optional (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xdmx 1.13.0-11.1.el6_4.2, xorg-x11-server-Xvfb 1.13.0-11.1.el6_4.2, xorg-x11-server-Xnest 1.13.0-11.1.el6_4.2, xorg-x11-server-source 1.13.0-11.1.el6_4.2 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xorg-x11-server 1.1.1-48.101.el5_10.1, xorg-x11-server-sdk 1.1.1-48.101.el5_10.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xdmx 1.13.0-11.1.el6_4.2, xorg-x11-server-Xorg 1.13.0-11.1.el6_4.2, xorg-x11-server-Xvfb 1.13.0-11.1.el6_4.2, xorg-x11-server-Xnest 1.13.0-11.1.el6_4.2, xorg-x11-server-common 1.13.0-11.1.el6_4.2, +2 more
    +4 more products
    Red Hat Enterprise Linux Server (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xorg 1.13.0-11.1.el6_4.2, xorg-x11-server-common 1.13.0-11.1.el6_4.2, xorg-x11-server-Xephyr 1.13.0-11.1.el6_4.2 Red Hat Enterprise Linux Server Optional (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xdmx 1.13.0-11.1.el6_4.2, xorg-x11-server-Xvfb 1.13.0-11.1.el6_4.2, xorg-x11-server-Xnest 1.13.0-11.1.el6_4.2, xorg-x11-server-source 1.13.0-11.1.el6_4.2 Red Hat Enterprise Linux Workstation (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xorg 1.13.0-11.1.el6_4.2, xorg-x11-server-common 1.13.0-11.1.el6_4.2, xorg-x11-server-Xephyr 1.13.0-11.1.el6_4.2 Red Hat Enterprise Linux Workstation Optional (v. 6) xorg-x11-server 1.13.0-11.1.el6_4.2, xorg-x11-server-Xdmx 1.13.0-11.1.el6_4.2, xorg-x11-server-Xvfb 1.13.0-11.1.el6_4.2, xorg-x11-server-Xnest 1.13.0-11.1.el6_4.2, xorg-x11-server-source 1.13.0-11.1.el6_4.2
    fixed: vendor fix RHSA-2013:1426
  • Red Hat Enterprise Linux 7 xorg-x11-server, xorg-x11-server-Xdmx, xorg-x11-server-Xorg, xorg-x11-server-Xvfb, xorg-x11-server-Xnest, xorg-x11-server-common, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.08% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.