{"id":"CVE-2025-11678","title":"Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in ord…","summary":"Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in ord…","severity":"none","cwe":["CWE-121"],"published":"2025-10-20","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:10:00.563","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-11678","references":[{"url":"https://libwebsockets.org/git/libwebsockets/commit?id=2bb9598562b37c942ba5b04bcde3f7fdf66a9d3a","label":"prodsec@nozominetworks.com"},{"url":"https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11678","label":"prodsec@nozominetworks.com"}],"tags":["nvd"],"epss":0.00285,"epssPercentile":0.19296,"ingestedAt":"2026-10-08T22:11:53.816Z","slug":"CVE-2025-11678","body":"## Overview\n\nStack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}