TI-2026-28013 Aliases CVE-2026-37228 GHSA-hgh6-r5p8-wcxj

FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_sctp_msg()…

MEDIUM 40CWE-617Published 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-617.

Summary

FlexRIC v2.0.0 contains a reachable assertion in e2ap_recv_sctp_msg() (src/lib/ep/e2ap_ep.c). The function allocates a fixed 32KB receive buffer and enforces assert(rc < len) on the sctp_recvmsg() return value. A remote unauthenticated attacker can send a single SCTP message with payload >= 32,768 bytes to crash the near-RT RIC, iApp, E2 Agent, or xApp process via SIGABRT. No valid E2AP PDU is required. All four SCTP endpoint types (ports 36421 and 36422) share this vulnerable code path. In Release builds (NDEBUG), the stripped assertion leads to a signed-to-unsigned integer overflow and potential out-of-bounds read.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00642 51st 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-2026-37228
2026-10-03 Alias added: GHSA-hgh6-r5p8-wcxj
2026-10-23 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/blob/main/advisories/CVE-2026-37228.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-2026-28011 FlexRIC v2.0.0 crashes when the iApp receives an E42_RIC_SUBSCRIPTION_REQUEST referencing… CVSS 3.1HIGH 7.5
TI-2026-28018 FlexRIC v2.0.0 contains an authorization bypass in the iApp's xApp isolation mechanism. 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