CVE-2026-44322

HIGH EPSS 30.9%
Published May 27, 20261mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published May 27, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF PATCH /3gpp-pfd-management/v1/{afId}/transactions/{transId}/applications/{appId} handler panics with a nil-pointer dereference when the upstream UDR call fails AND the consumer wrapper returns err != nil together with a nil *ProblemDetails. The handler's errPfdData != nil branch builds its own problemDetailsErr correctly, but immediately after it reads problemDetails.Cause (the OTHER value, which is nil in this branch) and panics. Gin recovery converts the panic into HTTP 500, so a single PATCH against this endpoint returns 500 instead of the intended controlled error response whenever UDR access is failing. This vulnerability is fixed in 4.2.2.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
30.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-476 NULL Pointer Dereference Memory Safety
CWE-754

Affected Products 1

VendorProductVersionRange
free5gcfree5gc* <4.2.2

References 4

  • github.com https://github.com/free5gc/free5gc/issues/925
    ExploitIssue Tracking
  • github.com https://github.com/free5gc/free5gc/security/advisories/GHSA-j59f-x285-69jx
    ExploitVendor Advisory
  • github.com https://github.com/free5gc/nef/commit/72a47f3fab4dffbd227f8d92c5f69dca93b610cb
    Patch
  • github.com https://github.com/free5gc/nef/pull/22
    Issue TrackingPatch

Remediation

  • github.com https://github.com/free5gc/nef/commit/72a47f3fab4dffbd227f8d92c5f69dca93b610cb
    Patch
  • github.com https://github.com/free5gc/nef/pull/22
    Issue TrackingPatch