CVE-2015-8983: GNU Glibc

High severity, CVSS 8.1. EPSS: 3.9% chance of exploitation in the next 30 days.

Integer overflow in the _IO_wstr_overflow function in libio/wstrops.c in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors related to computing a size in bytes, which triggers a heap-based buffer overflow.

Affected products

• GNU Glibc: up to and including 2.21

Published 2017-03-20. Last modified 2026-06-17.