What’s Vulnerable › Vulnerabilities

CVE-2025-30334: OpenBSD wg(4) kernel crash

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-20 · updated 2026-06-17
• Weakness: CWE-131

Description

In OpenBSD 7.6 before errata 006 and OpenBSD 7.5 before errata 015, traffic sent over wg(4) could result in kernel crash.

Affected products

• OpenBSD: before 7.5; 7.5, 7.5-errata_001, 7.5-errata_002, 7.5-errata_003, 7.5-errata_004, 7.5-errata_005 (+15) — fixed in 7.5

How to fix

Upgrade to a fixed version: OpenBSD 7.5. Check the vendor advisory for mitigations.

References

• https://ftp.openbsd.org/pub/OpenBSD/patches/7.5/common/015_wg.patch.sig
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.6/common/006_wg.patch.sig
• https://github.com/openbsd/src/commit/c06199859734d958552a581d72b4c0f910e68d7c

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