What’s Vulnerable › Vulnerabilities

CVE-2020-14345

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-15 · updated 2026-06-17
• Weakness: CWE-119

Description

A flaw was found in X.Org Server before xorg-x11-server 1.20.9. An Out-Of-Bounds access in XkbSetNames function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 20.04
• xorg-x11-server: before 1.20.9 — fixed in 1.20.9

How to fix

Upgrade to a fixed version: xorg-x11-server 1.20.9. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/01/15/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1862241
• https://lists.x.org/archives/xorg-announce/2020-August/003058.html
• https://security.gentoo.org/glsa/202012-01
• https://usn.ubuntu.com/4488-2/
• https://usn.ubuntu.com/4490-1/
• https://www.zerodayinitiative.com/advisories/ZDI-20-1416/
• http://www.openwall.com/lists/oss-security/2021/01/15/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1862241
• https://lists.x.org/archives/xorg-announce/2020-August/003058.html
• https://security.gentoo.org/glsa/202012-01
• https://usn.ubuntu.com/4488-2/

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