CVE-2026-88806
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductlibX11
PublishedSep 21, 2026
First seenSep 21, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- x.org libX111.8.14 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| x.org libX11 | v < 1.8.14 | 1.8.14 |
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