Description
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.
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 | xorg-server | 2:1.16.2.901-1 | — |
| Debian 13 | xorg-server | 2:1.16.2.901-1 | — |
| Debian 12 | xorg-server | 2:1.16.2.901-1 | — |
| Debian 7 | xorg-server | 2:1.12.4-6+deb7u5 | DSA-3095-1 |
| Debian 6.0 | xorg-server | 2:1.7.7-18+deb6u1 | DLA-120-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | nvidia-graphics-drivers-304 +1 | 304.125-0ubuntu0.0.1 | USN-2438-1 |
| Ubuntu 14.04 LTS | nvidia-graphics-drivers-331 +1 | 331.113-0ubuntu0.0.4 | USN-2438-1 |
| Ubuntu 14.04 LTS | xorg-server | 2:1.15.1-0ubuntu2.4 | USN-2436-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | xorg-x11-server +8 | 1.15.0-7.el7_0.3 | RHSA-2014:1983 |
| RHEL 6 | xorg-x11-server +8 | 1.15.0-25.el6_6 | RHSA-2014:1983 |
| RHEL 5 | xorg-x11-server +7 | 1.1.1-48.107.el5_11 | RHSA-2014:1982 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | xorg-x11-server-Xdmx +7 | 1.15.0-25.el6_6 | ELSA-2014-1983 |
Advisories 7
- RHSA-2014:1982 Red Hat Security Advisory: xorg-x11-server security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:1983 Red Hat Security Advisory: xorg-x11-server security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2438-1 nvidia-graphics-drivers-304, nvidia-graphics-drivers-304-updates, nvidia-graphics-drivers-331, nvidia-graphics-drivers-331-updates vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2436-1 xorg-server, xorg-server-lts-trusty vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3095-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-120-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2014-1983 Important: xorg-x11-server security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 11, 2014
References
- DSA-3095 vendor-advisory
- http://www.x.org/wiki/Development/Security/Advisory-2014-12-09/
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://advisories.mageia.org/MGASA-2014-0532.html
- GLSA-201504-06 vendor-advisory
- 62292 third-party-advisory
- MDVSA-2015:119 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
- 71597 vdb-entry
- 61947 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html