CVE-2019-7309: GNU Glibc

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is mishandled.

Affected products

• GNU Glibc: up to and including 2.29

Published 2019-02-03. Last modified 2026-06-17.