{"id":"CVE-2026-45160","summary":"ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser","details":"ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser (parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c) shipped with ESP-IDF's lwIP component. The parser walks the BOOTP/DHCP options field without validating that each option's length byte and declared payload length stay within the received packet buffer. A crafted DHCP request can cause the parser to read past the end of the options buffer into adjacent heap memory. The issue affects the DHCP server used by ESP-IDF's SoftAP and any configuration where the device runs as a DHCP server on a local network. This issue has been patched in versions 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.2.","aliases":["GHSA-g764-gwc3-75m5"],"modified":"2026-07-08T08:09:37.985678937Z","published":"2026-06-10T00:26:34.381Z","database_specific":{"cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45160.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45160.json"},{"type":"ADVISORY","url":"https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45160"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712"},{"type":"FIX","url":"https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/espressif/esp-idf","events":[{"introduced":"808b73fe9acf364b89e705234c1960ee3beaf295"},{"fixed":"2bf4dd12002dbae60a4b21abff010ecb2b8ee82b"},{"fixed":"2da2db43fd7e0bcff9e7b95f54f388296bb6f911"},{"fixed":"8b4b5d5301815198d177974ffc24848f47748248"},{"fixed":"9f713dbc94982d917f2d12964b233cd9efa4aeba"},{"fixed":"d51b1076092487e533eadf8b48c9c8579d3a6712"},{"fixed":"fba5f995436a3e3139f768b6d8f1a74d5ce1d318"}],"database_specific":{"source":["CPE_STRING","REFERENCES"],"cpe":["cpe:2.3:a:espressif:esp-idf:5.2.7:*:*:*:*:*:*:*","cpe:2.3:a:espressif:esp-idf:5.3.5:*:*:*:*:*:*:*","cpe:2.3:a:espressif:esp-idf:5.4.4:*:*:*:*:*:*:*","cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:*","cpe:2.3:a:espressif:esp-idf:6.0.1:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"5.2.7"},{"last_affected":"5.2.7"},{"introduced":"5.3.5"},{"last_affected":"5.3.5"},{"introduced":"5.4.4"},{"last_affected":"5.4.4"},{"introduced":"5.5.4"},{"last_affected":"5.5.4"},{"introduced":"6.0.1"},{"last_affected":"6.0.1"}]}}],"versions":["5.2.7","5.3.5","5.4.4","5.5.4","6.0.1","= 5.2.7","= 5.3.5","= 5.4.4","= 5.5.4","= 6.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45160.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}