How severe is CVE-2026-41285?

CVE-2026-41285 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-41285 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41285?

CVE-2026-41285 affects Openbsd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41285?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41285 have an EU (EUVD) identifier?

Yes. CVE-2026-41285 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23996.

When was CVE-2026-41285 published?

CVE-2026-41285 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-41285

CVE-2026-41285 is a medium-severity vulnerability in Openbsd with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23996
Weakness: CWE-835
Affected product: Openbsd
Published: 2026-04-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.
How severe is CVE-2026-41285?: CVE-2026-41285 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-41285 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41285?: CVE-2026-41285 affects Openbsd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41285?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41285 have an EU (EUVD) identifier?: Yes. CVE-2026-41285 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23996.
When was CVE-2026-41285 published?: CVE-2026-41285 was published on 2026-04-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

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