CVE-2026-1976 | THREATINT

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.

PUBLISHED Reserved 2026-02-05 | Published 2026-02-06 | Updated 2026-02-06 | Assigner VulDB

MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

5.0AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C

Problem types

NULL Pointer Dereference

Denial of Service

Timeline

2026-02-05:	Advisory disclosed
2026-02-05:	VulDB entry created
2026-02-05:	VulDB entry last update

Credits

LinZiyu (VulDB User) reporter

References

vuldb.com/?id.344498 (VDB-344498 | Free5GC SMF SessionDeletionResponse null pointer dereference) vdb-entry technical-description

vuldb.com/?ctiid.344498 (VDB-344498 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.743239 (Submit #743239 | free5gc SMF v4.1.0 Denial of Service) third-party-advisory

github.com/free5gc/free5gc/issues/817 issue-tracking

github.com/free5gc/free5gc/issues/817 exploit issue-tracking

github.com/free5gc/smf/pull/189 issue-tracking patch

github.com/free5gc/free5gc/ product

cve.org (CVE-2026-1976)

nvd.nist.gov (CVE-2026-1976)

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