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.
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Affected Vendors & Products
References
History
Tue, 02 Jun 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Unrestricted Buffer‑Overflow Assertion Crash in FlexRIC SCTP Receiver | |
| Weaknesses | CWE-680 CWE-788 |
Tue, 02 Jun 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-617 | |
| Metrics |
cvssV3_1
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Mon, 01 Jun 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Unrestricted Buffer‑Overflow Assertion Crash in FlexRIC SCTP Receiver | |
| Weaknesses | CWE-680 CWE-788 |
Mon, 01 Jun 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| References |
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Status: PUBLISHED
Assigner: mitre
Published: 2026-06-01T00:00:00.000Z
Updated: 2026-06-02T13:02:45.307Z
Reserved: 2026-04-06T00:00:00.000Z
Link: CVE-2026-37228
Updated: 2026-06-02T13:02:35.608Z
Status : Awaiting Analysis
Published: 2026-06-01T19:16:33.187
Modified: 2026-06-02T14:35:45.167
Link: CVE-2026-37228
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