Description
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.
Affected products
mosaic5g: flexric
References2
- github.com/MinamiKotor1/oran-security-advisories-zhongnan-luo/b… ExploitMitigationThird Party Advisory
- gitlab.eurecom.fr/mosaic5g/flexric Product
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 43 · as of 15 November 2026
- CWE
- CWE-191
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