Time-of-check Time-of-use (TOCTOU) Affecting kernel-debug-modules-internal package, versions *
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-CENTOS8-KERNELDEBUGMODULESINTERNAL-1972782
- published 23 Nov 2021
- disclosed 15 Nov 2021
Introduced: 15 Nov 2021
CVE-2021-4001 Open this link in a new tabHow to fix?
There is no fixed version for Centos:8 kernel-debug-modules-internal.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-internal package and not the kernel-debug-modules-internal package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
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.