{"id":"CVE-2023-28116","summary":"Buffer overflow in L2CAP due to misconfigured MTU","details":"Contiki-NG is an open-source, cross-platform operating system for internet of things (IoT) devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system.  The network stack of Contiki-NG uses a global buffer (packetbuf) for processing of packets, with the size of PACKETBUF_SIZE. In particular, when using the BLE L2CAP module with the default configuration, the PACKETBUF_SIZE value becomes larger then the actual size of the packetbuf.  When large packets are processed by the L2CAP module, a buffer overflow can therefore occur when copying the packet data to the packetbuf. The vulnerability has been patched in the \"develop\" branch of Contiki-NG, and will be included in release 4.9. The problem can be worked around by applying the patch manually.","aliases":["GHSA-m737-4vx6-pfqp"],"modified":"2026-04-10T04:56:51.202580Z","published":"2023-03-17T21:22:54.703Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28116.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-120"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28116.json"},{"type":"ADVISORY","url":"https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-m737-4vx6-pfqp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28116"},{"type":"FIX","url":"https://github.com/contiki-ng/contiki-ng/pull/2398"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/contiki-ng/contiki-ng","events":[{"introduced":"0"},{"last_affected":"9771e9aaebbfbb5633ce69eb9876e0fc70bbcd6f"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"4.8"}]}}],"versions":["2.0","2.1","2.2","2.2.1","2.2.2","2.2.3","2.3","2.4","2.5-release","2.6","2.6-rc0","develop/v3.x-fork","develop/v4.0","fork","old/v2.0","old/v2.1","old/v2.2","old/v2.2.1","old/v2.2.2","old/v2.2.3","old/v2.3","old/v2.4","old/v2.6","release/v4.0","release/v4.1","release/v4.2","release/v4.3","release/v4.4","release/v4.5","release/v4.6","release/v4.7","release/v4.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28116.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}