What is CVE-2021-44109?

CVE-2021-44109 is a high-severity vulnerability in Open5gs, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-04-05.

How severe is CVE-2021-44109?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Open5gs

CVE-2021-44109

A buffer overflow in lib/sbi/message.c in Open5GS 2.3.6 and earlier allows remote attackers to Denial of Service via a crafted sbi request.

Vulnerability class: Buffer Overflow

Published 2022-04-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.4th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Open5gs

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/open5gs/open5gs/issues/1247 (Exploit, Third Party Advisory, Issue Tracking)
github.com/open5gs/open5gs/commit/d919b2744cd05abae043490f0a3dd1946c1ccb8c (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44109?: CVE-2021-44109 is a high-severity vulnerability in Open5gs, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2022-04-05.
How severe is CVE-2021-44109?: High severity. CVSS v3 base score is 7.5 out of 10.