CVE-2020-27171

MediumCVSS 6.0/10Last modified Oct 8, 2026

Description

An issue was discovered in the Linux kernel 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, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

Metrics

CVSS 3.1 6.0/10CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

CWE-193

Affected software

No affected versions have been published.

Timeline

Published: Mar 20, 2021
Last modified: Oct 8, 2026
NVD status: Modified

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