CVE-2020-27170

CVE Details

Release Date:	2021-03-20
Impact:	None	What is this?

Description

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

See more information about CVE-2020-27170 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	4.7
Vector String:	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Version:	3.0
Attack Vector:	Local
Attack Complexity:	High
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	None
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel)	ELSA-2021-2314	2021-06-10
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9140	2021-03-31
Oracle Linux version 7 (kernel-uek)	ELSA-2021-9222	2021-05-10
Oracle Linux version 7 (kernel-uek-container)	ELSA-2021-9141	2021-03-31
Oracle Linux version 7 (kernel-uek-container)	ELSA-2021-9223	2021-05-10
Oracle Linux version 8 (kernel-uek)	ELSA-2021-9140	2021-03-31
Oracle Linux version 8 (kernel-uek-container)	ELSA-2021-9141	2021-03-31