CVE-2018-11237: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.10 only
• GNU Glibc: up to and including 2.27
• Netapp Data Ontap Edge: affected versions not specified
• Netapp Element Software Management: affected versions not specified
• Oracle Communications Session Border Controller: version 8.0.0 only; version 8.1.0 only; version 8.2.0 only
• Oracle Enterprise Communications Broker: version 3.0.0 only; version 3.1.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Red Hat Virtualization Host: version 4.0 only

Published 2018-05-18. Last modified 2026-06-17.