Description
X.Org Server (aka xserver and xorg-server) before 1.16.3 and 1.17.x before 1.17.1 allows remote attackers to obtain sensitive information from process memory or cause a denial of service (crash) via a crafted string length value in a XkbSetGeometry 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 | 2:1.16.4-1 | — |
| Debian 13 | xorg-server | 2:1.16.4-1 | — |
| Debian 12 | xorg-server | 2:1.16.4-1 | — |
| Debian 7 | xorg-server | 2:1.12.4-6+deb7u6 | DSA-3160-1 |
| Debian 6.0 | xorg-server | 2:1.7.7-18+deb6u2 | DLA-218-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | vnc4 | No fix yet | — |
| Ubuntu 14.04 LTS | xorg-server | 2:1.15.1-0ubuntu2.7 | USN-2500-1 |
| Ubuntu 14.04 LTS | xorg-server-lts-utopic | 2:1.16.0-1ubuntu1.2~trusty2 | USN-2500-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | vnc4 | 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1 | USN-4772-1 |
| Ubuntu Pro 14.04 LTS | vnc4 | 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1 | USN-4772-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | xorg-x11-server +8 | 1.15.0-33.ael7b_1 | RHSA-2015:0797 |
| RHEL 6 | xorg-x11-server +8 | 1.15.0-26.el6_6 | RHSA-2015:0797 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | fltk | 1.3.2-10.2 | SUSE-SU-2015:0939-1 |
| SLES 12 | tigervnc | 1.4.1-32.1 | SUSE-SU-2015:0939-1 |
| SLES 12 | xorg-x11-server | 7.6_1.15.2-21.1 | SUSE-SU-2015:0403-1, SUSE-SU-2015:0402-1, SUSE-SU-2015:0401-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | fltk | 1.3.2-10.2 | SUSE-SU-2015:0939-1 |
| SLES for SAP 12 | tigervnc | 1.4.1-32.1 | SUSE-SU-2015:0939-1 |
| SLES for SAP 12 | xorg-x11-server | 7.6_1.15.2-21.1 | SUSE-SU-2015:0403-1, SUSE-SU-2015:0402-1, SUSE-SU-2015:0401-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tigervnc | 1.7.0-2.1 | openSUSE-SU-2024:10056-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | xorg-x11-server-Xdmx +7 | 1.15.0-33.el7_1 | ELSA-2015-0797 |
Advisories 14
- USN-4772-1 vnc4 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2015:0797 Red Hat Security Advisory: xorg-x11-server security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2500-1 xorg-server, xorg-server-lts-trusty, xorg-server-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-218-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3160-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10056-1 libXvnc-devel-1.7.0-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0399-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0403-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0401-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0939-1 Security update for tigervnc, fltk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0402-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0400-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0398-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2015-0797 Moderate: xorg-x11-server security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 9, 2015
References
- openSUSE-SU-2015:0337 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- GLSA-201504-06 vendor-advisory
- http://advisories.mageia.org/MGASA-2015-0073.html
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- 72578 vdb-entry
- MDVSA-2015:119 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- DSA-3160 vendor-advisory
- USN-2500-1 vendor-advisory
- http://www.x.org/wiki/Development/Security/Advisory-2015-02-10/
- openSUSE-SU-2015:0338 vendor-advisory
- RHSA-2015:0797 vendor-advisory