CVE-2021-4135: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A memory leak vulnerability was found in the Linux kernel's eBPF for the Simulated networking device driver in the way user uses BPF for the device such that function nsim_map_alloc_elem being called. A local user could use this flaw to get unauthorized access to some data.

Affected products

• Linux Linux Kernel: before 5.16 (fixed in 5.16); version 5.16 only

Published 2022-07-14. Last modified 2026-10-08.