CVE-2023-23003: Linux Kernel

Medium severity, CVSS 4.0. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel before 5.16, tools/perf/util/expr.c lacks a check for the hashmap__new return value.

Affected products

• Linux Linux Kernel: before 5.16 (fixed in 5.16)

Published 2023-03-01. Last modified 2026-06-17.