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CVE-2026-41285

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...

Published: Apr 20, 2026Updated: Apr 20, 2026 Sources: CVE List
NVD MITRE
4.3CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low

Weaknesses

CWE-1284CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

OpenBSD
OpenBSD

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://www.rfc-editor.org/rfc/rfc4861#section-4.6
rfc-editor.org
https://github.com/openbsd/src/commit/086c5738bcd3c203bcc08d024fcf983cb409115f
github.com
https://www.openbsd.org/errata78.html
openbsd.org

Timeline

Published
Apr 20, 2026
Last Updated
Apr 20, 2026

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