{"id":"CVE-2026-106808","title":"OpenAirInterface Core Network v2.2.1 has a stack-based buffer overflow vulnerability in the OAI CN5G UDM Nudm_UEAU Generate Authentication Data endpoint","summary":"OpenAirInterface Core Network v2.2.1 has a stack-based buffer overflow vulnerability in the OAI CN5G UDM Nudm_UEAU Generate Authentication Data endpoint. The UDM passes attacker-controlled resynchronizationInfo.rand and auts values to co…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"adp","ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-02T19:04:32.283075Z"},"exploitAvailable":true,"published":"2026-11-02","updated":"2026-11-02","sourceUpdated":"2026-11-02T19:05:07.660Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106808","references":[{"url":"https://github.com/openairinterface/oai-cn5g-udm/issues/4"},{"url":"https://gist.github.com/hackeryounow/66b7612729af8e205089097e68a42116"}],"tags":["cve.org","exploit-available"],"epss":0.00528,"epssPercentile":0.44943,"ingestedAt":"2026-11-05T19:30:42.784Z","slug":"CVE-2026-106808","body":"## Overview\n\nOpenAirInterface Core Network v2.2.1 has a stack-based buffer overflow vulnerability in the OAI CN5G UDM Nudm_UEAU Generate Authentication Data endpoint. The UDM passes attacker-controlled resynchronizationInfo.rand and auts values to conv::hex_str_to_uint8(), which converts arbitrary-length hex strings into fixed-size stack buffers without validating the destination size. An unauthenticated attacker with access to the SBI interface and a valid SUPI can submit an oversized value to overwrite adjacent stack memory, corrupt the stack canary, and terminate the UDM process.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}