free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-smpolicycontrol/v1/sm-policies handler (HandleCreateSmPolicyRequest) panics with a nil-pointer dereference when a downstream OpenAPI consumer call (UDR lookup) returns 404 Not Found and the consumer wrapper returns err != nil together with a nil response struct. The handler logs the OpenAPI error and continues executing instead of returning, then dereferences the nil response struct on a subsequent line and panics. Gin recovery converts the panic into HTTP 500, so a single attacker-shaped POST returns 500 instead of a clean 4xx whenever the downstream lookup fails. The PCF process keeps running. The trigger is a single POST containing input that causes the downstream UDR lookup to fail (e.g. an unknown DNN). In 4.2.1 this endpoint is also reachable WITHOUT an Authorization header because the PCF Npcf_SMPolicyControl route group is mounted without inbound auth middleware. This vulnerability is fixed in 4.2.2.
CVE-2026-44316
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.7% (50th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 65EG Risk 65/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.7%
- EPSS %ILE
- 50th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
May 27, 2026
Last Modified
October 14, 2026
Advisory Details (4)
Auto-updated Jun 6, 2026[Bugs]PCF crashes (nil pointer dereference) when CreateSmPolicy triggers downstream OpenAPI 404 (DoS) · Issue #803 · free5gc/free5gc · GitHub
https://github.com/free5gc/free5gc/issues/803fix: smData mispositioned
Patch available: free5gc/pcf v1.4.2 (PR #62 merged 2026-01-21)
https://github.com/free5gc/pcf/pull/62commit df535f552431 (free5gc/pcf)
Patch available: free5gc/pcf v1.4.2 (contains commit df535f552431)
https://github.com/free5gc/pcf/commit/df535f5524314620715e842baf9723efbeb481a7PCF npcf-smpolicycontrol POST /sm-policies panics on downstream UDR/OpenAPI 404 via nil pointer dereference · Advisory · free5gc/free5gc · GitHub
https://github.com/free5gc/free5gc/security/advisories/GHSA-wr8j-6chw-gm6pVendor Advisories for CVE-2026-44316(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| github.com/free5gc/pcf | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 30× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 174 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 75 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-18 03:39 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-14 20:28 UTCEG score recompute
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-12 16:05 UTCEG score recompute
- 2026-10-11 19:47 UTCEG score recompute
- 2026-10-11 17:02 UTCEG score recompute
- 2026-10-11 14:27 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-03 16:49 UTCOSV refresh
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
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- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-14 07:37 UTCEG score recompute
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-13 03:09 UTCOSV refresh
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-25 05:15 UTCEG score recompute
- 2026-08-23 14:59 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-21 20:32 UTCEG score recompute
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-20 11:17 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-16 15:13 UTCEG score recompute
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-16 02:48 UTCEG score recompute
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-14 01:25 UTCEG score recompute
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-12 23:13 UTCEG score recompute
- 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-12 00:47 UTCEG score recompute
- 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-11 00:11 UTCEG score recompute
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-09 19:40 UTCEG score recompute
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-08 21:15 UTCEG score recompute
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-07 17:56 UTCEG score recompute
- 2026-08-06 19:29 UTCEG score recompute
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-05 20:52 UTCEG score recompute
- 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-02 13:36 UTCEG score recompute
- 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-08-01 15:10 UTCEG score recompute
- 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-07-31 07:29 UTCEG score recompute
- 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-07-29 15:03 UTCEG score recompute
- 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-07-27 10:09 UTCEG score recompute
- 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Related CVEs(same product + same CWE)
Same product
4 shownGo:github.com/free5gc/pcf
Frequently asked(5)
What is CVE-2026-44316?
When was the CVE record for CVE-2026-44316 published?
Is CVE-2026-44316 actively exploited?
What is the CVSS score of CVE-2026-44316?
How do I remediate CVE-2026-44316?
Dependency Blast Radius
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