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A vulnerability has been found in Free5GC SMF up to 4.1.0. Affected by this vulnerability is the function HandlePfcpSessionReportRequest of the file internal/pfcp/handler/handler.go of the component PFCP. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. To fix this issue, it is recommended to deploy a patch.

CVE-2026-1683 is a vulnerability identified in the Free5GC Session Management Function (SMF) component, specifically affecting versions 4.0 and 4.1.0. The flaw resides in the HandlePfcpSessionReportRequest function within the PFCP (Packet Forwarding Control Protocol) handler code (internal/pfcp/handler/handler.go). By manipulating the input to this function, an attacker can trigger a denial of service (DoS) condition, causing the SMF to crash or become unresponsive. The vulnerability is remotely exploitable without requiring any authentication or user interaction, making it accessible to unauthenticated attackers over the network. The PFCP protocol is critical in 5G core networks for managing user plane sessions, so disruption here can impact the overall network service availability. The vulnerability has been publicly disclosed, increasing the risk of exploitation, although no active exploits have been reported in the wild to date. The CVSS 4.0 base score of 6.9 reflects a medium severity, considering the network attack vector, no privileges or user interaction needed, and limited impact on confidentiality and integrity but significant impact on availability. The lack of a patch link in the provided data suggests that organizations should monitor Free5GC vendor communications closely for official fixes.

Detailed information about CVE-2026-1683: Denial of Service in Free5GC SMF affecting Free5GC SMF. Get real-time updates, technical details, and mitigation strat

CVE-2026-1683: Denial of Service in Free5GC SMF - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-1683: Denial of Service in Free5GC SMF

A flaw has been found in Free5GC SMF up to 4.1.0. Affected is the function HandlePfcpAssociationReleaseRequest of the file internal/pfcp/handler/handler.go of the component PFCP UDP Endpoint. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been published and may be used. A patch should be applied to remediate this issue.

CVE-2026-1682 identifies a null pointer dereference vulnerability in Free5GC's Session Management Function (SMF) component, specifically in versions 4.0 and 4.1.0. The flaw exists in the HandlePfcpAssociationReleaseRequest function located in the internal/pfcp/handler/handler.go file, which processes PFCP (Packet Forwarding Control Protocol) association release requests over UDP. When this function improperly handles crafted PFCP messages, it dereferences a null pointer, causing the SMF process to crash or become unresponsive. This vulnerability can be exploited remotely by an attacker sending malicious PFCP association release requests to the affected SMF instance, without requiring authentication or user interaction. The PFCP protocol is critical in 5G core networks for control plane communication between SMF and UPF (User Plane Function), so disruption here can impact session management and network stability. Although no active exploitation in the wild has been reported, a public exploit is available, increasing the urgency for remediation. The vulnerability has a CVSS 4.0 score of 6.9, indicating a medium severity with network attack vector, low attack complexity, no privileges or user interaction needed, and limited impact on availability. The flaw does not affect confidentiality or integrity directly but can cause denial of service by crashing the SMF. Free5GC is an open-source 5G core network implementation increasingly adopted by telecom operators and research institutions, making this vulnerability relevant to the 5G ecosystem. No official patch links were provided at the time of publication, but users are advised to monitor Free5GC releases for updates addressing this issue.

Detailed information about CVE-2026-1682: NULL Pointer Dereference in Free5GC SMF affecting Free5GC SMF. Get real-time updates, technical details, and mitigatio

CVE-2026-1682: NULL Pointer Dereference in Free5GC SMF - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-1682: NULL Pointer Dereference in Free5GC SMF


CVE-2026-1683: Denial of Service in Free5GC SMFCVE-2026-1683 0 A vulnerability has been found in Free5GC SMF up to 4.1.0. Affected by this vulnerability is the function HandlePfcpSessionReportRequest of the file internal/pfcp/handler/handler.go of the component PFCP. The manipulation leads to denial of service. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. To fix this issue, it is recommended to deploy a patch. MediumVulnerabilityUnited StatesChinaSouth Korea+10#cve #cve-2026-1683 Join the discussion	CVE Database V5	01/30/2026, 14:02:09 UTC Added: 01/30/2026, 15:12:51 UTC
CVE-2026-1682: NULL Pointer Dereference in Free5GC SMFCVE-2026-1682 0 A flaw has been found in Free5GC SMF up to 4.1.0. Affected is the function HandlePfcpAssociationReleaseRequest of the file internal/pfcp/handler/handler.go of the component PFCP UDP Endpoint. Executing a manipulation can lead to null pointer dereference. The attack may be launched remotely. The exploit has been published and may be used. A patch should be applied to remediate this issue. MediumVulnerabilityUnited StatesChinaSouth Korea+7#cve #cve-2026-1682 Join the discussion	CVE Database V5	01/30/2026, 14:02:07 UTC Added: 01/30/2026, 15:12:51 UTC

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