CVE-2021-31871: Debian Linux

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems.

Affected products

• Debian Debian Linux: version 9.0 only
• Klibc Project Klibc: before 2.0.9 (fixed in 2.0.9)

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