this post was submitted on 09 Apr 2026
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121
We Found a Ticking Time Bomb in macOS TCP Networking - It Detonates After Exactly 49 Days - Photon Blog (photon.codes)
submitted 2 days ago* (last edited 2 days ago) by warbosstodd@piefed.social to c/technology@lemmy.world
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[–] Treczoks@lemmy.world 7 points 1 day ago (1 children)

These kinds of bugs have been around for ages. There was one like this in WinNT, and this was found when the OS was finally stable enough to run for as long as that...

That this bug was found just now tells me that nobody lets a Mac run for serious lengths of time...

[–] Aatube@lemmy.dbzer0.com 2 points 1 day ago (1 children)

Multiple reports on Apple's community forums and open-source projects describe symptoms that match this bug precisely:

  • Apple Community #250867747: macOS Catalina — "New TCP connections can not establish." New connections enter SYN_SENT then immediately close. Existing connections unaffected. Only a reboot fixes it.
  • Apple Community #252991075: "Mac Pro TCP/IP stops working." TCP completely fails, but ping (ICMP) works normally.
  • Podman issue #12495: "podman machine network connectivity stalls after some uptime" on macOS 12. The VM running on macOS shows outbound TCP failure with ICMP still functional, occurring after running for multiple weeks.
[–] Treczoks@lemmy.world 2 points 7 hours ago (1 children)

Amazing that nobody so far noticed the similarities to the WinNT bug of old.

[–] Aatube@lemmy.dbzer0.com 2 points 5 hours ago

It seems to me like nobody bothered to measure how long it took to trigger, and those in the first two threads seem unaware that it is caused by uptime and not some other random thing