CVE-2023-52558: OpenBSD

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.

Affected products

• OpenBSD OpenBSD: before 7.3 (fixed in 7.3); version 7.3 only; version 7.4 only

Published 2024-03-01. Last modified 2026-06-17.