CVE-2020-1751: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 0.5% chance of exploitation in the next 30 days.

An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the frame address, resulting in a denial of service or potential code execution. The highest threat from this vulnerability is to system availability.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.10 only
• GNU Glibc: before 2.31 (fixed in 2.31)
• Red Hat Enterprise Linux: version 8.0 only

Published 2020-04-17. Last modified 2026-06-17.