CVE-2026-33283

MEDIUM6.5EPSS 0.03%

Ella Core panics on malformed ULNASTransport Message without a Request Type

Published: 3/19/2026Modified: 3/25/2026

Also known as:GHSA-3366-gw57-fcm5GO-2026-4776

Description

## Summary Ella Core panics when processing malformed UL NAS Transport NAS messages without a Request Type. ## Impact 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. ## Fix Add a guard when receiving an UL NAS Message without a Request Type given no SM Context.

Affected packages (2)

Go/github.com/ellanetworks/corefrom 0, < 1.6.0
Go/github.com/ellanetworks/corefrom 0, < 1.6.0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (3)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-33283
PATCHhttps://github.com/ellanetworks/core
WEBhttps://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5