CVE-2021-4001
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-4001
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-4001.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-4001
- Downstream
- Related
- Published
- 2022-01-21T19:15:09Z
- Modified
- 2025-08-09T20:01:26Z
- Severity
-
- 4.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
A race condition was found in the Linux kernel's ebpf verifier between bpfmapupdateelem and bpfmapfreeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (capsysadmin or capbpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.
- References