OpenBSD 7.6 — pfsyncook — errata 017_pfsyncook — reliability fix — syspatch and remediation
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: OpenBSD 7.6 📖 ~4 min read • Source: OpenBSD 7.6 errata 017_pfsyncook Errata topic: Reliability: pfsyncook (All architectures) Issued: June 17, 2025 Upstream summary: When using syncookies in pf(4), new TCP connections could run into timeout due to integer underflow. Table of […]