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PRIOn knowledge basePRION:CVE-2021-4001HistoryJan 21, 2022 - 7:15 p.m.
Race condition
2022-01-2119:15:00
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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.
| CPE | Name | Operator | Version |
|---|---|---|---|
| linux_kernel | eq | 5.16 rc1 | |
| linux_kernel | le | 5.15 |
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