CVE-2020-8165: Debian Linux

Critical severity, CVSS 9.8. EPSS: 45.7% chance of exploitation in the next 30 days.

A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Opensuse Leap: version 15.1 only; version 15.2 only
• Rubyonrails Rails: before 5.2.4.3 (fixed in 5.2.4.3); from 6.0.0, before 6.0.3.1 (fixed in 6.0.3.1)

Published 2020-06-19. Last modified 2026-06-17.