TI-2026-28016 Aliases CVE-2026-37231 GHSA-vm9w-mqxm-485q

FlexRIC v2.0.0 uses a uint16_t counter for xapp_id assignment but stores the value in…

LOW 39CWE-191Published 2026-06-01 · Updated 2026-06-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.

Summary

FlexRIC v2.0.0 uses a uint16_t counter for xapp_id assignment but stores the value in uint32_t message fields. After 65,530+ E42_SETUP_REQUESTs, the 16-bit counter wraps around and produces duplicate xapp_ids. The iApp (port 36422) crashes when attempting to register a duplicate ID in its internal data structure. A remote attacker can trigger this by repeatedly connecting and requesting new xApp registrations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00488 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mosaic5g:flexric:2.0.0:::::::*	2.0.0	Vulnerable	Mosaic5g

cpe:2.3:a:mosaic5g:flexric:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·Mosaic5g

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-37231
2026-10-03 Alias added: GHSA-vm9w-mqxm-485q
2026-10-25 Priority changed: MEDIUM → LOW

References

Exploit 1

https://github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisories/CVE-2026-37231.md

Other 1

https://gitlab.eurecom.fr/mosaic5g/flexric

TI-2026-28019 FlexRIC v2.0.0 allows a single SCTP connection to bind multiple xapp_ids by sending… CVSS 3.1HIGH 8.2
TI-2026-28020 FlexRIC v2.0.0 trusts the xapp_id field from E42 message payloads without binding it to… CVSS 3.1HIGH 7.5
TI-2026-28015 FlexRIC v2.0.0 crashes when the near-RT RIC receives a RIC_INDICATION message with a… CVSS 3.1HIGH 7.5
TI-2026-28014 FlexRIC v2.0.0 contains a reachable assertion in e2ap_create_pdu() triggered when ASN.1… CVSS 3.1HIGH 7.5
TI-2026-28013 FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_sctp_msg()… CVSS 3.1HIGH 7.5
TI-2026-28011 FlexRIC v2.0.0 crashes when the iApp receives an E42_RIC_SUBSCRIPTION_REQUEST referencing… CVSS 3.1HIGH 7.5

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences