FlexRIC 2.0.0 SCTP Endpoint src/lib/ep/e2ap_ep.c e2ap_recv_sctp_msg integer overflow

Summaryinfo

A vulnerability described as critical has been identified in FlexRIC 2.0.0. This vulnerability affects the function e2ap_recv_sctp_msg in the library src/lib/ep/e2ap_ep.c of the component SCTP Endpoint. The manipulation results in integer overflow. This vulnerability is reported as CVE-2026-37228. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in FlexRIC 2.0.0. Affected is the function e2ap_recv_sctp_msg in the library src/lib/ep/e2ap_ep.c of the component SCTP Endpoint. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at gitlab.eurecom.fr. This vulnerability is traded as CVE-2026-37228 since 04/06/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• FlexRIC

Version

• 2.0.0

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CPE 2.2info

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