PT-2026-26958 · Free5Gc · Free5Gc

Shovon0203 · Published 2026-03-22 · Updated 2026-03-22 · CVE-2026-4531

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions Free5GC version 4.1.0

Description A weakness exists in the HandleRegistrationComplete function within the internal/gmm/handler.go file of the AMF component. Exploitation can lead to a denial of service. The attack can be performed remotely.

Recommendations Apply patch 52e9386401ce56ea773c5aa587d4cdf7d53da799.

Exploit

Fix

DoS

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

CVE-2026-4531

GHSA-XQ44-64RG-8G3H

Affected Products

Free5Gc

References · 14

• 🔥 https://github.com/free5gc/free5gc/issues/792 · Exploit
• https://github.com/free5gc/amf/pull/198 · Patch
• https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799 · Patch
• https://osv.dev/vulnerability/CVE-2026-4531 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4531 · Security Note
• https://osv.dev/vulnerability/GHSA-xq44-64rg-8g3h · Vendor Advisory
• https://github.com/free5gc/amf · Note
• https://twitter.com/CVEnew/status/2035619717487132797 · Twitter Post
• https://twitter.com/CVEarity/status/2035760770928296330 · Twitter Post
• https://vuldb.com/?submit.774073 · Note
• https://twitter.com/cyberbivash/status/2035542188726120650 · Twitter Post
• https://github.com/free5gc/free5gc · Note
• https://vuldb.com/?ctiid.352319 · Note
• https://vuldb.com/?id.352319 · Note