CVE-2026-37231

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.

• CWE-191

• https://github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisories/CVE-2026-37231.mdExploit, Mitigation, Third Party Advisory
• https://gitlab.eurecom.fr/mosaic5g/flexricProduct

Published

Jun 1, 2026

Last Modified

Jul 22, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-37226FlexRIC v2.0.0 crashes when the iApp receives an E42_RIC_SUB…7.5
• CVE-2026-37227FlexRIC v2.0.0 contains reachable assert(0) calls in stub me…7.5
• CVE-2026-37228FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_s…7.5
• CVE-2026-37229FlexRIC v2.0.0 contains a reachable assertion in e2ap_create…7.5
• CVE-2026-3723A security flaw has been discovered in code-projects Simple …9.8
• CVE-2026-37230FlexRIC v2.0.0 crashes when the near-RT RIC receives a RIC_I…7.5
• CVE-2026-37232An issue was discovered in OpenAirInterface5G 2.4.0 (nr-soft…8.6
• CVE-2026-37233FlexRIC v2.0.0 contains an authorization bypass in the iApp'…7.5
• CVE-2026-37234FlexRIC v2.0.0 allows a single SCTP connection to bind multi…8.2
• CVE-2026-37235FlexRIC v2.0.0 trusts the xapp_id field from E42 message pay…7.5
• CVE-2026-3724A weakness has been identified in SourceCodester Patients Wa…8.8
• CVE-2026-3725A flaw has been found in 1024-lab/lab1024 SmartAdmin up to 3…8.8