CVE-2023-5156: GNU Glibc

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.

Affected products

• GNU Glibc: from 2.34, before 2.39 (fixed in 2.39)
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-09-25. Last modified 2026-06-17.