# CVE-2026-41285: In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor…

Source: https://junglewise.ai/threats/cve-2026-41285-in-openbsd-through-7-8-the-slaacd-and-rad-daemons-have-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-21  
License: CC BY 4.0 with a link back

CVE-2026-41285 · Severity: medium · CVSS 4.3 · Published 2026-04-21

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.

Technologies: [Openbsd](https://junglewise.ai/threats/technologies/openbsd). Vendors: [OpenBSD](https://junglewise.ai/threats/vendors/openbsd).

## Quick answers

**Is CVE-2026-41285 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41285 being exploited in the wild.

**How severe is CVE-2026-41285?** Medium severity, with a CVSS score of 4.3, published 21 April 2026.

**Which products and versions are affected?** Openbsd. The advisory does not name versions.

**Is there a fix for CVE-2026-41285?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-41285?** Check whether you run Openbsd. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Openbsd

## Related threats

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- [OpenBSD TKIP MIC-failure countermeasure inverted comparison](https://junglewise.ai/threats/cve-2026-56101-openbsd-tkip-mic-failure-countermeasure-inverted-comparison)
- [OpenBSD use-after-free in System V semaphore implementation](https://junglewise.ai/threats/cve-2026-57589-openbsd-use-after-free-in-system-v-semaphore-implementation)
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- [FreeBSD and NetBSD file integrity bypass in mmap function](https://junglewise.ai/threats/cve-1999-0323-freebsd-and-netbsd-file-integrity-bypass-in-mmap-function)