Description
Multiple integer overflows in X.org libXext 1.3.1 and earlier allow X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to the (1) XcupGetReservedColormapEntries, (2) XcupStoreColors, (3) XdbeGetVisualInfo, (4) XeviGetVisualInfo, (5) XShapeGetRectangles, and (6) XSyncListSystemCounters functions.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxext | 2:1.3.1-2+deb7u1 | — |
| Debian 13 | libxext | 2:1.3.1-2+deb7u1 | — |
| Debian 12 | libxext | 2:1.3.1-2+deb7u1 | — |
| Debian 7 | libxext | 2:1.3.1-2+deb7u1 | DSA-2682-1 |
| Debian 6.0 | libxext | 2:1.1.2-1+squeeze1 | DSA-2682-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | libX11 +2 | 1.6.0-2.2.el6 | RHSA-2014:1436 |
| RHEL 6 | libXcursor +1 | 1.1.14-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXext +1 | 1.3.2-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXfixes +1 | 5.0.1-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXi +1 | 1.7.2-2.2.el6 | RHSA-2014:1436 |
| RHEL 6 | libXp +1 | 1.0.2-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXrandr +1 | 1.4.1-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXrender +1 | 0.9.8-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXres +1 | 1.0.7-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXt +1 | 1.1.4-6.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXtst +1 | 1.2.2-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXv +1 | 1.0.9-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXvMC +1 | 1.0.8-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXxf86dga +1 | 1.1.4-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libXxf86vm +3 | 1.1.3-2.1.el6 | RHSA-2014:1436 |
| RHEL 6 | libdmx +1 | 1.1.3-3.el6 | RHSA-2014:1436 |
| RHEL 6 | libxcb +3 | 1.9.1-2.el6 | RHSA-2014:1436 |
| RHEL 6 | xcb-proto | 1.8-3.el6 | RHSA-2014:1436 |
| RHEL 6 | xkeyboard-config +1 | 2.11-1.el6 | RHSA-2014:1436 |
| RHEL 6 | xorg-x11-proto-devel | 7.7-9.el6 | RHSA-2014:1436 |
| RHEL 6 | xorg-x11-xtrans-devel | 1.3.4-1.el6 | RHSA-2014:1436 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libXext | 1.3.3-3.19 | openSUSE-SU-2024:10559-1 |
Advisories 3
- RHSA-2014:1436 Red Hat Security Advisory: X11 client libraries security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2682-1 libxext - several Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10559-1 libXext-devel-1.3.3-3.19 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-1857-1 vendor-advisory
- [oss-security] 20130523 Fwd: [ANNOUNCE] X.Org Security Advisory: Protocol handling issues in X Window System client libraries mailing-list
- openSUSE-SU-2013:1009 vendor-advisory
- DSA-2682 vendor-advisory
- http://www.x.org/wiki/Development/Security/Advisory-2013-05-23