Dutch Developer Uncovers Y2K Bug in Legacy BSD System

Dutch Developer Uncovers Y2K Bug in Legacy BSD System

First seen 15 Jun 2026, 18:37 UTC Theregistervanheusden.com 98% similarity 27.9

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A Dutch developer, Folkert van Heusden, discovered an unpatched Y2K bug in the Network Time Protocol daemon of BSD 2.11 while working on a PDP-11/70 emulator. This bug affects systems that utilize a Precision Standard Time, Inc. receiver to synchronize time via short-wave broadcasts. The issue, which results in a time offset of approximately 17,000 years, is not a significant threat unless specific outdated hardware is still in use. Van Heusden has created a fix for the bug, marking it as one of the last remaining Y2K vulnerabilities. The PDP-11/70, a minicomputer from the 1970s, is rarely used today, limiting the impact of this discovery. The developer's emulator can run on modern hardware like a Raspberry Pi Pico, making it accessible for enthusiasts. Users are advised to apply the patch if they wish to experiment with timekeeping on this legacy system.

Key Points: • A Y2K bug was found in the BSD 2.11 Network Time Protocol daemon by a Dutch developer. • The bug affects the PDP-11/70 system and requires specific outdated hardware to exploit. • A fix has been developed, marking one of the last known Y2K vulnerabilities.

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Timeline

2026-06-15
Y2K bug discovered in BSD 2.11
Folkert van Heusden identified an unpatched Y2K bug affecting the Network Time Protocol daemon while working on a PDP-11/70 emulator.
Theregister
2026-06-15
Fix developed for Y2K bug
Van Heusden created a patch to synchronize time correctly, addressing the 17,000-year offset issue.
Theregister

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