CVE-2026-34002
MEDIUMDescription
A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 39% of all known CVEs.
References
- access.redhat.com
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Related Vulnerabilities
Other CWE-805 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-14509 | Critical | 9.8 | 2.0% | - | Fix |
| CVE-2025-23319 | High | 8.1 | 1.6% | - | Fix |
| CVE-2024-24851 | High | 7.5 | 1.4% | - | - |
| CVE-2021-31885 | High | 7.5 | 1.2% | - | Fix |
| CVE-2023-20049 | High | 8.6 | 1.0% | - | Fix |
| CVE-2020-16101 | High | 7.5 | 1.0% | - | Fix |
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Markdown
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<a href="https://tridentstack.com/cve/CVE-2026-34002"><img src="https://tridentstack.com/cve/badge/CVE-2026-34002.svg" alt="CVE-2026-34002"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-08.