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CVE-2021-33200

Public on 2021-05-27
Modified on 2021-07-12
Description

A flaw was found in kernel/bpf/verifier.c in BPF in the Linux kernel. An incorrect limit is enforced for pointer arithmetic operations which can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Severity
Medium
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CVSS v3 Base Score
7.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2021-07-08 18:38 ALAS-2021-1516
Amazon Linux 1 kernel 2024-12-05 20:57 ALAS-2024-1952
Amazon Linux 2 - Core kernel 2021-07-01 01:00 ALAS2-2021-1675
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-01-20 23:37 ALAS2KERNEL-5.10-2022-002
Amazon Linux 2 - Livepatch Extra kernel-livepatch-4.14.232-176.381 2021-07-14 22:04 ALAS2LIVEPATCH-2021-054

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H