CVE-2026-88806
Publication date 21 September 2026
Last updated 12 October 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libx11 | 26.04 LTS resolute |
Fixed 2:1.8.13-1ubuntu0.1
|
| 24.04 LTS noble |
Fixed 2:1.8.7-1ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed 2:1.7.5-1ubuntu0.4
|
|
| 20.04 LTS focal |
Fixed 2:1.6.9-2ubuntu1.6+esm1
|
|
| 18.04 LTS bionic |
Fixed 2:1.6.4-3ubuntu0.4+esm3
|
|
| 16.04 LTS xenial |
Fixed 2:1.6.3-1ubuntu2.2+esm5
|
|
| 14.04 LTS trusty |
Fixed 2:1.6.2-1ubuntu2.1+esm6
|
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CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8913-1
- libx11 vulnerabilities
- 12 October 2026