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Case File

CVE-2018-20839

MEDIUM · CVSS 4.3 EPSS 2.48% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-05-17 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2018-20839
Severity
MEDIUM
CVSS
4.3
EPSS
2.48%

Original NVD Description

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.