CVE-2026-44328

Published: Mag 27, 2026 Last Modified: Mag 27, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 8,2

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: none

Scope: unchanged

Confidentiality: none

Integrity: low

Availability: high

Description

AI Translation Available

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unconditionally dereferences upNode.UPF after the type-guarded async release, even though AN-typed nodes are constructed without a UPF object. As a result, a single unauthenticated DELETE /upi/v1/upNodesLinks/gNB1 request crashes the handler with a nil-pointer panic AND mutates the in-memory user-plane topology before panicking (the UpNodeDelete(upNodeRef) line runs first). This is an unauthenticated, state-mutating panic-DoS sink that an off-path network attacker can trigger by name against any AN entry. This vulnerability is fixed in 4.2.2.

306

Missing Authentication for Critical Function

Draft

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Other

Potential Impacts:

Gain Privileges Or Assume Identity Varies By Context

Applicable Platforms

Technologies: Cloud Computing, ICS/OT

Likelihood of Exploit: High

View CWE Details

476

NULL Pointer Dereference

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Availability Integrity Confidentiality

Potential Impacts:

Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory

Applicable Platforms

Languages: C, C++, Java, C#, Go

Likelihood of Exploit: Medium

View CWE Details

862

Missing Authorization

Incomplete

Abstraction: Class Structure: Simple

Common Consequences

Security Scopes Affected:

Confidentiality Integrity Access Control Availability

Potential Impacts:

Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Bypass Protection Mechanism Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)