CVE-2023-23846: OPEN5GS

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Due to insufficient length validation in the Open5GS GTP library versions prior to versions 2.4.13 and 2.5.7, when parsing extension headers in GPRS tunneling protocol (GPTv1-U) messages, a protocol payload with any extension header length set to zero causes an infinite loop. The affected process becomes immediately unresponsive, resulting in denial of service and excessive resource consumption. CVSS3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Affected products

• OPEN5GS OPEN5GS: before 2.4.13 (fixed in 2.4.13); version 2.5.6 only

Published 2023-02-01. Last modified 2026-06-17.