What is the CVSS score of CVE-2026-1976?

CVE-2026-1976 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Free5gc are affected by CVE-2026-1976?

Organizations using Free5GC should be aware of moderate risk from CVE-2026-1976 rated CVSS 5.3. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2026-1976?

Yes, a public proof-of-concept exploit is available for CVE-2026-1976. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-1976?

Within 30 days: Identify affected systems running Free5GC and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Free5gc CVE-2026-1976

MEDIUM

Improper Resource Shutdown or Release (CWE-404)

2026-02-06 cna@vuldb.com

Null Pointer Dereference Free5gc

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 09, 2026 - 15:04 vuln.today

Public exploit code

CVE Published

Feb 06, 2026 - 03:15 nvd

MEDIUM 5.3

DescriptionCVE.org

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.

AnalysisAI

Free5GC versions up to 4.1.0 are vulnerable to a null pointer dereference in the SMF component's SessionDeletionResponse function, allowing unauthenticated remote attackers to cause denial of service. Public exploit code exists for this vulnerability, and no patch is currently available.

Technical ContextAI

Classified as CWE-404 (Improper Resource Shutdown or Release). Affects Free5Gc. 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.