CVE-2021-20266: Fedoraproject Fedora

Medium severity, CVSS 4.9. EPSS: 1.7% chance of exploitation in the next 30 days.

A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system availability.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Rpm Rpm: before 4.16.1.3 (fixed in 4.16.1.3)

Published 2021-04-30. Last modified 2026-06-17.