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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductOpenbsd
PublishedApr 21, 2026
First seenApr 21, 2026
Weakness typeCWE-1284CWE-1284
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openbsd openbsd | v ≤ 7.8 | — |
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