CVE-2019-9894: Debian Linux

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Fedoraproject Fedora: version 28 only; version 29 only
• Netapp Oncommand Unified Manager: affected versions not specified
• Opensuse Leap: version 15.0 only
• Putty Putty: before 0.71 (fixed in 0.71)

Published 2019-03-21. Last modified 2026-06-17.