CVE-2026-88806
Published: September 24, 2026Last modified: October 24, 2026
Description
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libx11 | Unknown (1.8.2-r0) |
| 25 LTS | libx11 | Unknown (1.8.11-r0) | |
| Stream | libx11 | Fixed (1.8.14-r0) | |
| Hardened Containers | 23 LTS | libx11 | Unknown (1.8.2-r0) |
| 25 LTS | libx11 | Unknown (1.8.11-r0) | |
| Stream | libx11 | Fixed (1.8.14-r0) |