CVE-2017-15670: GNU Glibc

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

The GNU C Library (aka glibc or libc6) before 2.27 contains an off-by-one error leading to a heap-based buffer overflow in the glob function in glob.c, related to the processing of home directories using the ~ operator followed by a long string.

Affected products

• GNU Glibc: up to and including 2.26

Published 2017-10-20. Last modified 2026-06-17.