CVE-2026-1976

Medium

Description

A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.

SeverityMedium

CVSS5.3

Exploit probability—

ProductFree5gc

PublishedFeb 6, 2026

First seenFeb 6, 2026

Weakness typeCWE-476NULL pointer dereference CWE-404CWE-404

How to fix

Patches

github.com/free5gc/smf/pull/189

Affected products

Product	Affected versions	Fixed in
free5gc free5gc	v ≤ 4.1.0	—

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