Unrated
CVE-2021-4001
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.
Announced Group revision 1
Original source ↗CVE-2021-4001
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2021-4001
kernel
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "n/a",
"product": "kernel",
"versions": [
{
"status": "affected",
"version": "kernel 5.16 rc2"
}
]
}
]- Related CVEs
- CVE-2021-4001
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #15869 · Revision 1
- Added to Heist Feed
- Publisher date