Description
An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The X11 Project | libX11 | 1.6.10 | — |
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 | libx11 | 2:1.6.10-1 | — |
| Debian 13 | libx11 | 2:1.6.10-1 | — |
| Debian 12 | libx11 | 2:1.6.10-1 | — |
| Debian 9 | libx11 | 2:1.6.4-3+deb9u2 | DLA-2312-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libx11 | 2:1.6.9-2ubuntu1.1 | USN-4487-1 |
| Ubuntu 18.04 LTS | libx11 | 2:1.6.4-3ubuntu0.3 | USN-4487-1 |
| Ubuntu 16.04 LTS | libx11 | 2:1.6.3-1ubuntu2.2 | USN-4487-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libx11 | 2:1.6.2-1ubuntu2.1+esm1 | USN-4487-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | egl-wayland | 1.1.5-3.el8 | RHSA-2021:1804 |
| RHEL 8 | libX11 +3 | 1.6.8-4.el8 | RHSA-2021:1804 |
| RHEL 8 | libdrm +1 | 2.4.103-1.el8 | RHSA-2021:1804 |
| RHEL 8 | libglvnd +6 | 1:1.3.2-1.el8 | RHSA-2021:1804 |
| RHEL 8 | libinput +2 | 1.16.3-1.el8 | RHSA-2021:1804 |
| RHEL 8 | libwacom +2 | 1.6-2.el8 | RHSA-2021:1804 |
| RHEL 8 | mesa +15 | 20.3.3-2.el8 | RHSA-2021:1804 |
| RHEL 8 | xorg-x11-drivers | 7.7-30.el8 | RHSA-2021:1804 |
| RHEL 8 | xorg-x11-server +9 | 1.20.10-1.el8 | RHSA-2021:1804 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libglvnd +6 | 1:1.3.2-1.el8 | ALSA-2021:1804 |
| AlmaLinux 8 | libinput-devel | 1.16.3-1.el8 | ALSA-2021:1804 |
| AlmaLinux 8 | libwacom-devel | 1.6-2.el8 | ALSA-2021:1804 |
| AlmaLinux 8 | mesa-libgbm-devel +1 | 20.3.3-2.el8 | ALSA-2021:1804 |
| AlmaLinux 8 | xorg-x11-drivers | 7.7-30.el8 | ALSA-2021:1804 |
| AlmaLinux 8 | xorg-x11-server-devel +1 | 1.20.10-1.el8 | ALSA-2021:1804 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | egl-wayland | 1.1.5-3.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | libX11 | 1.6.8-4.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | libdrm | 2.4.103-1.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | libglvnd | 1:1.3.2-1.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | libinput | 1.16.3-1.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | libwacom | 1.6-2.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | mesa | 20.3.3-2.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | xorg-x11-drivers | 7.7-30.el8 | RLSA-2021:1804 |
| Rocky Linux 8 | xorg-x11-server | 1.20.10-1.el8 | RLSA-2021:1804 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | libX11 | 1.6.5-3.6.2 | SUSE-SU-2020:2197-1, SUSE-SU-2020:2116-1 |
| SLES 15 SP2 | libxcb | 1.13-3.5.1 | SUSE-SU-2020:2116-1 |
| SLES 15 SP1 | libX11 | 1.6.5-3.6.2 | SUSE-SU-2020:2197-1, SUSE-SU-2020:2116-1 |
| SLES 15 SP1 | libxcb | 1.13-3.5.1 | SUSE-SU-2020:2116-1 |
| SLES 15 | libX11 | 1.6.5-3.6.2 | SUSE-SU-2020:2197-1, SUSE-SU-2020:2116-1 |
| SLES 15 | libxcb | 1.13-3.5.1 | SUSE-SU-2020:2116-1 |
| SLES 12 SP5 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES 12 SP5 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES 12 SP4 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES 12 SP4 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES 12 SP3 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES 12 SP2 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES 12 SP2 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES 11 SP4 | xorg-x11-libX11 | 7.4-5.11.72.15.1 | SUSE-SU-2020:14447-1, SUSE-SU-2020:14445-1 |
| SLES for SAP 15 | libX11 | 1.6.5-3.6.2 | SUSE-SU-2020:2197-1, SUSE-SU-2020:2116-1 |
| SLES for SAP 15 | libxcb | 1.13-3.5.1 | SUSE-SU-2020:2116-1 |
| SLES for SAP 12 SP5 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP5 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP4 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP4 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP3 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP3 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP2 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SLES for SAP 12 SP2 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SLE HPC 15 | libX11 | 1.6.5-3.6.2 | SUSE-SU-2020:2197-1, SUSE-SU-2020:2116-1 |
| SLE HPC 15 | libxcb | 1.13-3.5.1 | SUSE-SU-2020:2116-1 |
| SUSE OpenStack Cloud Crowbar 9 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud Crowbar 9 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud Crowbar 8 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud Crowbar 8 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 9 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 9 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 8 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 8 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 7 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE OpenStack Cloud 7 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xorg-x11-libX11 | 7.4-5.11.72.15.1 | SUSE-SU-2020:14447-1, SUSE-SU-2020:14445-1 |
| SUSE HPE Helion OpenStack 8 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE HPE Helion OpenStack 8 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
| SUSE Enterprise Storage 5 | libX11 | 1.6.2-12.8.1 | SUSE-SU-2020:2196-1, SUSE-SU-2020:2117-1 |
| SUSE Enterprise Storage 5 | libxcb | 1.10-4.5.1 | SUSE-SU-2020:2117-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libX11 | 1.7.2-1.2 | openSUSE-SU-2024:10918-1 |
| openSUSE Leap 15.2 | libX11 | 1.6.5-lp152.5.3.1 | openSUSE-SU-2020:1182-1, openSUSE-SU-2020:1164-1 |
| openSUSE Leap 15.2 | libxcb | 1.13-lp152.5.3.1 | openSUSE-SU-2020:1164-1 |
| openSUSE Leap 15.1 | libX11 | 1.6.5-lp151.4.3.1 | openSUSE-SU-2020:1198-1, openSUSE-SU-2020:1162-1 |
| openSUSE Leap 15.1 | libxcb | 1.13-lp151.4.3.1 | openSUSE-SU-2020:1162-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libx11 | 1.6.10-r0 | — |
| Alpine v3.23 | libx11 | 1.6.10-r0 | — |
| Alpine v3.22 | libx11 | 1.6.10-r0 | — |
| Alpine v3.21 | libx11 | 1.6.10-r0 | — |
| Alpine v3.20 | libx11 | 1.6.10-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libx11 | 1.6.10-r0 | — |
| Alpine v3.18 | libx11 | 1.6.10-r0 | — |
| Alpine v3.17 | libx11 | 1.6.10-r0 | — |
| Alpine v3.16 | libx11 | 1.6.10-r0 | — |
| Alpine v3.15 | libx11 | 1.6.10-r0 | — |
| Alpine v3.14 | libx11 | 1.6.10-r0 | — |
| Alpine v3.13 | libx11 | 1.6.10-r0 | — |
| Alpine v3.12 | libx11 | 1.6.10-r0 | — |
| Alpine v3.11 | libx11 | 1.6.10-r0 | — |
| Alpine v3.10 | libx11 | 1.6.10-r0 | — |
| Alpine v3.9 | libx11 | 1.6.10-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libX11 +2 | 1.6.7-3.amzn2.0.1 | ALAS2-2021-1661 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | egl-wayland | 1.1.5-3.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | libX11 +3 | 1.6.8-4.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | libdrm +1 | 2.4.103-1.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | libglvnd +6 | 1:1.3.2-1.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | libinput +2 | 1.16.3-1.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | libwacom +2 | 1.6-2.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | mesa-libGL +14 | 20.3.3-2.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | xorg-x11-drivers | 7.7-30.el8 | ELSA-2021-1804 |
| Oracle Linux 8 | xorg-x11-server-Xdmx +8 | 1.20.10-1.el8 | ELSA-2021-1804 |
Advisories 19
- ALSA-2021:1804 Moderate: userspace graphics, xorg-x11, and mesa security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2021:1804 Red Hat Security Advisory: userspace graphics, xorg-x11, and mesa security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-4487-2 libx11 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4487-1 libx11 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2312-1 libx11 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1804 Moderate: userspace graphics, xorg-x11, and mesa security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2020:2197-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1164-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10918-1 libX11-6-1.7.2-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14447-1 Security update for xorg-x11-libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14445-1 Security update for xorg-x11-libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1162-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2116-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2117-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2196-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1198-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1182-1 Security update for libX11 SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2021-1661 Moderate: libX11 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2021
- ELSA-2021-1804 Moderate: userspace graphics, xorg-x11, and mesa security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://lists.x.org/archives/xorg-announce/2020-July/003050.html
- https://www.openwall.com/lists/oss-security/2020/07/31/1
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14344
- openSUSE-SU-2020:1162 vendor-advisory
- openSUSE-SU-2020:1164 vendor-advisory
- openSUSE-SU-2020:1182 vendor-advisory
- openSUSE-SU-2020:1198 vendor-advisory
- FEDORA-2020-eba554b9d5 vendor-advisory
- GLSA-202008-18 vendor-advisory
- USN-4487-1 vendor-advisory
- FEDORA-2020-9a0b272cc1 vendor-advisory
- USN-4487-2 vendor-advisory
- FEDORA-2020-cf0afbd27e vendor-advisory