{"cve":"CVE-2018-20839","nvd":{"published":"2019-05-17T04:29:00.933","modified":"2026-06-17T01:53:34.263","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":4.3},"cwes":[],"references":["http://www.securityfocus.com/bid/108389","https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993","https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f","https://github.com/systemd/systemd/pull/12378","https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"],"products":["netapp:cn1610_firmware","netapp:snapprotect","netapp:solidfire_\\&_hci_management_node","systemd_project:systemd"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2018-20839","score":0.02478,"percentile":0.84564,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}