PT-2026-26958 · Free5Gc · Free5Gc

Shovon0203 · CVE-2026-4531 · Published 2026-03-22 · Updated 2026-07-30

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

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

GO-2026-5767

OPENSUSE-SU-2026:21483-1

Affected Products

Free5Gc

References · 1752

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4531.json · Exploit
• 🔥 https://github.com/free5gc/free5gc/issues/792 · Exploit
• https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799 · Patch
• https://github.com/free5gc/amf/pull/198 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-4531 · Security Note
• https://osv.dev/vulnerability/GHSA-xq44-64rg-8g3h · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5767 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-4531 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:21483-1 · Vendor Advisory
• https://github.com/free5gc/amf · Note
• https://suse.com/security/cve/CVE-2025-65797 · Note
• https://suse.com/security/cve/CVE-2026-44427 · Note
• https://suse.com/security/cve/CVE-2026-27589 · Note
• https://suse.com/security/cve/CVE-2026-7736 · Note
• https://suse.com/security/cve/CVE-2026-27137 · Note