CVE-2026-32319: Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-13 · updated 2026-06-17
Weakness: CWE-125

Description

Ella Core is a 5G core designed for private networks. Prior to 1.5.1, Ella Core panics when processing a malformed integrity protected NGAP/NAS message with a length under 7 bytes. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. This vulnerability is fixed in 1.5.1.

Affected products

ellanetworks core: before 1.5.1 — fixed in 1.5.1

How to fix

Upgrade to a fixed version: ellanetworks core 1.5.1. Check the vendor advisory for mitigations.

References

https://github.com/ellanetworks/core/security/advisories/GHSA-m9pm-w3gv-c68f

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