P4Verified

CVE-2020-27171: linux kernel before 5.11.8 (exclusive); +4 more affected products

CVE-2020-27171. CVSS 3.1 base score 6.0 (MEDIUM, NVD). EPSS 0.00577 (percentile 0.45808), scored 2026-10-08.

Affected technology

linux kernel · before 5.11.8 (exclusive)
linux

fedora · 32
fedoraproject

fedora · 33
fedoraproject

fedora · 34
fedoraproject

debian linux · 9.0
debian

ubuntu linux · 14.04
canonical

ubuntu linux · 16.04
canonical

ubuntu linux · 18.04
canonical

ubuntu linux · 20.04
canonical

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

Description’s affected range: before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leadin

Component: Not specified by the source

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

What an attacker can do

NVD’s CVSS 3.1 assessment (base score 6.0/10) rates confidentiality and availability impact as high; integrity impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 2026-10-09 03:15:32.014646+00:00

CWE: CWE-193
CCR priority: 24.1 /100 (P4)
CVSS 3.1: 6.0 /10 · CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H · NVD
EPSS: 0.00577 · percentile 0.45808 · 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-2020-27171.html