# CVE-2026-37224: EURECOM FlexRIC denial of service via duplicate E2 setup request

Source: https://junglewise.ai/threats/cve-2026-37224-eurecom-flexric-denial-of-service-via-duplicate-e2-setup-request  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-01. Updated: 2026-06-01  
License: CC BY 4.0 with a link back

CVE-2026-37224 · Severity: info · CVSS 7.5 · Published 2026-06-01

EURECOM FlexRIC, a controller used in 5G radio access networks, is vulnerable to a remote crash. An attacker can send a specific sequence of duplicate connection requests to the system, causing the controller process to shut down unexpectedly. This results in a denial of service, disrupting the management of the cellular network infrastructure.

Technologies: [EURECOM FlexRIC](https://junglewise.ai/threats/technologies/flexric). Vendors: [EURECOM](https://junglewise.ai/threats/vendors/eurecom).

## Quick answers

**Is CVE-2026-37224 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-37224 being exploited in the wild.

**How severe is CVE-2026-37224?** Informational severity, with a CVSS score of 7.5, published 1 June 2026.

**Which products and versions are affected?** EURECOM FlexRIC v2.0.0 through commit 6a595d8b.

**Is there a fix for CVE-2026-37224?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-37224 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-37224?** Check whether you run EURECOM FlexRIC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A reachable assertion vulnerability (CWE-617) exists in FlexRIC v2.0.0 within the E2 node registry component (src/lib/msg_hand/reg_e2_nodes.c). The function add_reg_e2_node() uses an assert() statement to enforce GlobalE2node_ID uniqueness instead of implementing graceful error handling for duplicate registrations. A remote, unauthenticated attacker can trigger this assertion by sending two E2_SETUP_REQUEST messages with the same node configuration over SCTP to port 36421. This causes the iApp process to receive a SIGABRT signal and terminate, leading to a complete denial of service. As of the advisory date, no official patch is available, and users are advised to restrict SCTP access to trusted nodes.

## Affected products

- EURECOM FlexRIC v2.0.0 through commit 6a595d8b

## Timeline

- 2026-06-01: disclosed
- 2026-06-01: advisory

## References

- [https://github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisories/CVE-2026-37224.md](https://github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisories/CVE-2026-37224.md)
- [https://gitlab.eurecom.fr/mosaic5g/flexric](https://gitlab.eurecom.fr/mosaic5g/flexric)

## Related threats

- [EURECOM FlexRIC resource leak via multiple xApp identity bindings](https://junglewise.ai/threats/cve-2026-37234-eurecom-flexric-resource-leak-via-multiple-xapp-identity-bindings)
- [EURECOM FlexRIC xApp impersonation and DoS in iApp component](https://junglewise.ai/threats/cve-2026-37235-eurecom-flexric-xapp-impersonation-and-dos-in-iapp-component)
- [EURECOM FlexRIC authorization bypass in iApp xApp isolation](https://junglewise.ai/threats/cve-2026-37233-eurecom-flexric-authorization-bypass-in-iapp-xapp-isolation)
- [EURECOM FlexRIC denial of service via xapp_id integer wraparound](https://junglewise.ai/threats/cve-2026-37231-eurecom-flexric-denial-of-service-via-xapp-id-integer-wraparound)
- [EURECOM FlexRIC NULL pointer dereference in near-RT RIC](https://junglewise.ai/threats/cve-2026-37230-eurecom-flexric-null-pointer-dereference-in-near-rt-ric)