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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.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-20 | Updated 2026-04-21 | Assigner mitre




MEDIUM: 4.3CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-1284 Improper Validation of Specified Quantity in Input

Product status

Default status
unaffected

Any version
affected

References

www.rfc-editor.org/rfc/rfc4861

github.com/...ommit/086c5738bcd3c203bcc08d024fcf983cb409115f

www.openbsd.org/errata78.html

cve.org (CVE-2026-41285)

nvd.nist.gov (CVE-2026-41285)

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