BDU:2022-05887

Уязвимость верификатора ebpf компонента bpf_map_update_elem и bpf_map_freeze (kernel/bpf/syscall.c) ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на целостность данных

Severity: MEDIUM (4.1) Vector: AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

References:

CVE-2021-4001

Published: 2022-01-21
Modified: 2024-11-21

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.

Severity: MEDIUM (4.1) Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

References:

Version: 2.1.1

Package kernel-image-std-pae update in sisyphus on 2021-12-01

ALT-PU-2021-3433-1

Closed vulnerabilities

BDU:2022-05887

CVE-2021-4001