High severityNVD Advisory· Published Oct 20, 2025· Updated Apr 15, 2026

CVE-2025-11678

Description

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 order to craft a response with a matching id containing a label longer than the maximum.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

libwebsockets.org/git/libwebsockets/commitnvd
www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11678nvd

News mentions

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