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open5gs

A flaw has been found in Open5GS up to 2.7.6. The impacted element is the function sgwc_tunnel_add of the file /src/sgwc/context.c of the component SGWC. Executing a manipulation of the argument pdr can lead to reachable assertion. The attack can be executed remotely. The exploit has been published and may be used. It is advisable to implement a patch to correct this issue. The issue report is flagged as already-fixed.

CVE-2026-1738 is a vulnerability identified in Open5GS, an open-source 5G core network implementation widely used for mobile network infrastructure. The flaw resides in the SGWC (Serving Gateway Control) component, specifically in the sgwc_tunnel_add function located in the /src/sgwc/context.c source file. The vulnerability arises when the function processes the pdr (Packet Detection Rule) argument; crafted input can cause a reachable assertion failure. This means that under certain manipulated conditions, the program encounters an assertion statement that fails, leading to abnormal termination or denial of service. The vulnerability can be triggered remotely without requiring any authentication or user interaction, increasing its risk profile. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and low impact on availability (VA:L) with no impact on confidentiality or integrity. Although exploit code has been published, there are no confirmed reports of active exploitation in the wild. The issue has been addressed in versions beyond 2.7.6, and users are advised to upgrade or apply patches to mitigate the risk. The vulnerability primarily threatens the availability of the affected system by causing crashes or service interruptions in the SGWC component, which is critical for 5G packet routing and session management.

Detailed information about CVE-2026-1738: Reachable Assertion in Open5GS affecting null Open5GS. Get real-time updates, technical details, and mitigation strate

CVE-2026-1738: Reachable Assertion in Open5GS - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-1738: Reachable Assertion in Open5GS

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