What’s Vulnerable › Vulnerabilities

CVE-2023-40359

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-14 · updated 2026-06-17

Description

xterm before 380 supports ReGIS reporting for character-set names even if they have unexpected characters (i.e., neither alphanumeric nor underscore), aka a pointer/overflow issue. This can only occur for xterm installations that are configured at compile time to use a certain experimental feature.

Affected products

• Invisible-Island Xterm: before 380 — fixed in 380

How to fix

Upgrade to a fixed version: Invisible-Island Xterm 380. Check the vendor advisory for mitigations.

References

• https://invisible-island.net/xterm/xterm.log.html#xterm_380
• https://invisible-island.net/xterm/xterm.log.html#xterm_380

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