What is CVE-2026-37231?

CVE-2026-37231 is a high-severity vulnerability in Mosaic5g Flexric, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-06-01.

How severe is CVE-2026-37231?

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

Integer overflow in Mosaic5g Flexric

CVE-2026-37231

FlexRIC v2.0.0 uses a uint16_t counter for xapp_id assignment but stores the value in uint32_t message fields. After 65,530+ E42_SETUP_REQUESTs, the 16-bit counter wraps around and produces duplicate xapp_ids. The iApp (port 36422) crashes…

EPSS: 0.001 (28.1th percentile) — read the EPSS interpretation.

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.

Affected products

Mosaic5g Flexric — versions 2.0.0
N/a — versions n/a

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2026-37231?: CVE-2026-37231 is a high-severity vulnerability in Mosaic5g Flexric, classified under Integer Underflow. CVSS score: 7.5/10. Published 2026-06-01.
How severe is CVE-2026-37231?: High severity. CVSS v3 base score is 7.5 out of 10.