Security Advisory

CVE-2021-4001

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2022-01-21 00:00:00

Last updated 2024-08-03 17:16:03

Assigner redhat

CVSS score not scored

State PUBLISHED

Description

A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.

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