What is CVE-2020-27194?

CVE-2020-27194 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Conversion between Numeric Types. CVSS score: 5.5/10. Published 2020-10-16.

How severe is CVE-2020-27194?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2020-27194 known to be exploited?

33 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2020-27194

An issue was discovered in the Linux kernel before 5.8.15. scalar32_min_max_or in kernel/bpf/verifier.c mishandles bounds tracking during use of 64-bit values, aka CID-5b9fbeb75b6a.

Published 2020-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.2th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

Public proof-of-concept exploits

References

github.com/torvalds/linux/commit/5b9fbeb75b6a98955f628e205ac26689bcb1383e (Patch, Third Party Advisory)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.15 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-27194?: CVE-2020-27194 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Conversion between Numeric Types. CVSS score: 5.5/10. Published 2020-10-16.
How severe is CVE-2020-27194?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2020-27194 known to be exploited?: 33 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.