Detections
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CVE-2026-41285
medium
Description
In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an "nd_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.
References
https://www.rfc-editor.org/rfc/rfc4861#section-4.6
https://www.openbsd.org/errata78.html
https://github.com/openbsd/src/commit/086c5738bcd3c203bcc08d024fcf983cb409115f