P5Verified

CVE-2020-27170: linux kernel before 5.11.8 (exclusive); +4 more affected products

CVE-2020-27170. CVSS 3.1 base score 4.7 (MEDIUM, NVD). EPSS 0.00565 (percentile 0.45158), scored 2026-10-08.

Affected technology

linux kernel · before 5.11.8 (exclusive)
linux

fedora · 32
fedoraproject

fedora · 33
fedoraproject

fedora · 34
fedoraproject

ubuntu linux · 14.04
canonical

ubuntu linux · 16.04
canonical

ubuntu linux · 18.04
canonical

ubuntu linux · 20.04
canonical

debian linux · 9.0
debian

n/a · n/a
Vendor not specified by the source

Description’s affected range: 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 miti

Component: Not specified by the source

Attack conditions (NVD, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

NVD’s CVSS 3.1 assessment (base score 4.7/10) rates confidentiality impact as high; integrity and availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 2026-10-09 03:15:34.406540+00:00

CWE: CWE-203
CCR priority: 18.9 /100 (P5)
CVSS 3.1: 4.7 /10 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N · NVD
EPSS: 0.00565 · percentile 0.45158 · 2026-10-08
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-09 03:17:07.463462+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-09 03:13:32.966430+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2020-27170.html