What is CVE-2021-3114?

CVE-2021-3114 is a medium-severity vulnerability in Golang Go, classified under Incorrect Calculation. CVSS score: 6.5/10. Published 2021-01-26.

How severe is CVE-2021-3114?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-3114 known to be exploited?

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

Vulnerability in Golang Go

CVE-2021-3114

In Go before 1.14.14 and 1.15.x before 1.15.7, crypto/elliptic/p224.go can generate incorrect outputs, related to an underflow of the lowest limb during the final complete reduction in the P-224 field.

Published 2021-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.027 (85.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-682 — Incorrect Calculation

Public proof-of-concept exploits

References

groups.google.com/g/golang-announce/c/mperVMGa98w (Third Party Advisory, Release Notes)
github.com/golang/go/commit/d95ca9138026cbe40e0857d76a81a16d03230871 (Patch, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
www.debian.org/security/2021/dsa-4848 (vendor-advisory, Third Party Advisory)
security.netapp.com/advisory/ntap-20210219-0001/ (Third Party Advisory)
lists.debian.org/debian-lts-announce/2021/03/msg00014.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2021/03/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
security.gentoo.org/glsa/202208-02 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3114?: CVE-2021-3114 is a medium-severity vulnerability in Golang Go, classified under Incorrect Calculation. CVSS score: 6.5/10. Published 2021-01-26.
How severe is CVE-2021-3114?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-3114 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.