CVE-2026-37226: EURECOM FlexRIC null pointer dereference in iApp subscription handling

CVE-2026-37226 · Severity: info · CVSS 8.6 · Published 2026-06-01

FlexRIC, a controller used in Open RAN cellular networks, is vulnerable to a remote crash. An unauthenticated attacker can send a specially crafted subscription request to the system, causing the iApp process to stop functioning. This results in a denial of service, disrupting the management and intelligence operations of the radio access network.

Technologies: EURECOM FlexRIC. Vendors: EURECOM.

Quick answers

Is CVE-2026-37226 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-37226 being exploited in the wild.
How severe is CVE-2026-37226?
Informational severity, with a CVSS score of 8.6, published 1 June 2026.
Which products and versions are affected?
EURECOM FlexRIC v2.0.0 through commit 6a595d8b.
Is there a fix for CVE-2026-37226?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-37226 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-37226?
Check whether you run EURECOM FlexRIC at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A NULL pointer dereference exists in FlexRIC v2.0.0 within the `find_map_e2_node_sad()` function in `src/ric/map_e2_node_sockaddr.c`. When the iApp receives an `E42_RIC_SUBSCRIPTION_REQUEST` referencing a non-existent `global_e2_node_id`, the lookup function returns NULL. In debug builds, this triggers an `assert()` (SIGABRT), while in release builds, the pointer is dereferenced, leading to a segmentation fault (SIGSEGV). A remote, unauthenticated attacker can exploit this by sending a malicious request to SCTP port 36422, resulting in a denial of service of the iApp and co-located RIC services.

Affected products

  • EURECOM FlexRIC v2.0.0 through commit 6a595d8b

Timeline

  • 2026-06-01: advisory: NVD and researcher advisory published

References

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