CVE-2019-6488: GNU Glibc

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The string component in the GNU C Library (aka glibc or libc6) through 2.28, when running on the x32 architecture, incorrectly attempts to use a 64-bit register for size_t in assembly codes, which can lead to a segmentation fault or possibly unspecified other impact, as demonstrated by a crash in __memmove_avx_unaligned_erms in sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.

Affected products

• GNU Glibc: up to and including 2.28

Published 2019-01-18. Last modified 2026-06-17.