Which versions of Open5GS are affected by CVE-2026-92417?

Open5GS versions up to and including 2.8.0 are affected by a high-severity denial-of-service vulnerability in the PFCP implementation that can crash the SMF/UPF processes and disrupt 5G user-plane…. A patch is available.

How to fix or mitigate CVE-2026-92417?

Within 24 hours, inventory all Open5GS deployments to identify any running version 2.8.0 or earlier. Within 7 days, apply the upstream fix (commit 8f07b507b78ff94776f2cd49276eb116ed93d7f2) or upgrade to a release that incorporates it (patch available per vendor advisory); as an interim mitigation, restrict N4/PFCP traffic to authorized internal SMF/UPF peers only and enforce authentication if supported. Within 30 days, verify that all instances are patched, review network segmentation to confirm N4 is not internet-facing, and implement monitoring for process aborts or malformed PFCP messages. Note: vendor CVSS vector indicates PR:L (authenticated) while independent assessment scores it PR:N (unauthenticated), so treat the N4 interface as untrusted and apply defense-in-depth.

Open5GS CVE-2026-92417

Q: What is the CVSS score of CVE-2026-92417?

CVE-2026-92417 has a CVSS 4.0 base score of 7.1 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

EUVD-2026-80936 HIGH

NULL Pointer Dereference (CWE-476)

2026-09-16 VulDB

Denial Of Service Null Pointer Dereference Open5gs N A

7.1

CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY

7.1 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

7.5 HIGH

PFCP/N4 has no application authentication (PR:N); malformed IE crashes the daemon with availability-only impact (A:H, C:N/I:N); network-reachable but realistically internal interface.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Sep 16, 2026 - 19:05 vuln.today

CVE Published

Sep 16, 2026 - 18:00 cve.org

HIGH 7.1

DescriptionCVE.org

A vulnerability was found in Open5GS up to 2.8.0. This affects the function ogs_pfcp_parse_volume_measurement in the library lib/pfcp/types.c of the component PFCP Handler. The manipulation results in null pointer dereference. The attack may be launched remotely. The patch is identified as 8f07b507b78ff94776f2cd49276eb116ed93d7f2. A patch should be applied to remediate this issue.

AnalysisAI

Denial of service in Open5GS up to and including 2.8.0: a crafted PFCP message that declares a Volume Measurement information element shorter than the fields the parser actually reads causes a null pointer dereference in ogs_pfcp_parse_volume_measurement in lib/pfcp/types.c, aborting the affected SMF/UPF process and disrupting the 5G core user-plane control path. The attack is launched remotely by sending malformed PFCP signaling to the N4 interface, which in a correctly segmented deployment is an internal control-plane segment rather than an internet-facing service; the vendor's CVSS 4.0 vector scores it 7.1 with PR:L, while our independent assessment scores 7.5 (CVSS 3.1, AV:N/AC:L/PR:N/UI:N, availability-only impact) because Open5GS's PFCP implementation does not enforce authentication. …

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Vulnerability AssessmentAI

Exploitation	Requires network reachability to the Open5GS PFCP/N4 interface (SMF/UPF control-plane), which in correct deployments is an internal, segmented network segment rather than an internet-facing service - this is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	All signals point to a denial-of-service issue of moderate real-world urgency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation	Upstream fix available (PR/commit); released patched version not independently confirmed. … Detailed patch versions, workarounds, and compensating controls in full report.