CVE-2026-88806
Fixed in a distro release EPSS <1%CVSS 7.5
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
Products: x.org libx11
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 8 | libX11 | 1.6.8-10.el8_10 |
| AlmaLinux 8 | libX11-common | 1.6.8-10.el8_10 |
| AlmaLinux 8 | libX11-devel | 1.6.8-10.el8_10 |
| AlmaLinux 8 | libX11-xcb | 1.6.8-10.el8_10 |
| Alpine 3.24 | libx11 | 1.8.14-r0 |
| Amazon Linux 2 | libX11 | 1.6.7-3.amzn2.0.6 |
| Amazon Linux 2 | libX11-common | 1.6.7-3.amzn2.0.6 |
| Amazon Linux 2 | libX11-devel | 1.6.7-3.amzn2.0.6 |
| Amazon Linux 2023 | libX11 | 1.8.10-2.amzn2023.0.2 |
| Amazon Linux 2023 | libX11-common | 1.8.10-2.amzn2023.0.2 |
| Amazon Linux 2023 | libX11-devel | 1.8.10-2.amzn2023.0.2 |
| Amazon Linux 2023 | libX11-xcb | 1.8.10-2.amzn2023.0.2 |
| Debian 12 | libx11 | no fix |
| Debian 13 | libx11 | no fix |
| Debian 14 | libx11 | no fix |
| Rocky Linux 8 | libX11 | 0:1.6.8-10.el8_10 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Micro 5.3 | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Micro 5.4 | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Micro 5.5 | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libX11 | 1.8.10-150700.4.8.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | libX11 | 1.6.2-12.41.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libX11 | 1.8.7-150600.3.11.1 |
| SUSE Linux Enterprise Server 16.0 | libX11 | 1.8.10-160000.4.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | libX11 | 1.6.2-12.41.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libX11 | 1.6.5-150000.3.41.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libX11 | 1.8.7-150600.3.11.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libX11 | 1.8.10-160000.4.1 |
| SUSE Linux Micro 6.2 | libX11 | 1.8.10-160000.4.1 |
| Ubuntu 22.04 LTS | libx11 | 2:1.7.5-1ubuntu0.4 |
| Ubuntu 24.04 LTS | libx11 | 2:1.8.7-1ubuntu0.1 |
| Ubuntu 26.04 LTS | libx11 | 2:1.8.13-1ubuntu0.1 |
| Ubuntu 26.10 | libx11 | no fix |
| Ubuntu Pro 14.04 LTS | libx11 | 2:1.6.2-1ubuntu2.1+esm6 |
| Ubuntu Pro 16.04 LTS | libx11 | 2:1.6.3-1ubuntu2.2+esm5 |
| Ubuntu Pro 18.04 LTS | libx11 | 2:1.6.4-3ubuntu0.4+esm3 |
| Ubuntu Pro 20.04 LTS | libx11 | 2:1.6.9-2ubuntu1.6+esm1 |
| openSUSE Leap 16.0 | libX11 | 1.8.10-160000.4.1 |
| openSUSE Tumbleweed | libX11 | 1.8.13-2.1 |