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Known update issues

Thunderbird: DSA-6585-1 update breaks PGP-encrypted email, fixed in DSA-6585-2

FixedKnown issue

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Summary

The Thunderbird update in Debian Security Advisory DSA-6585-1 introduced a regression in the support for PGP-encrypted emails. Debian published DSA-6585-2 on 2026-10-27 with corrected packages. The issue is fixed.

Symptoms

Handling of PGP-encrypted emails (PGP = Pretty Good Privacy) in Thunderbird no longer works correctly after the DSA-6585-1 update. The advisory gives no error messages or codes.

Affected

  • Debian: thunderbird package updated by DSA-6585-1
  • The advisory does not list specific Debian releases or package versions.

Workaround

No workaround known.

Fix

Install the updated thunderbird packages from DSA-6585-2 (published 2026-10-27), for example via the regular Debian security updates.

Recommendation

Install the DSA-6585-2 update on all Debian systems with Thunderbird, especially where PGP-encrypted email is used. Afterwards, verify that encrypted emails can be read and sent.

Sources

Compiled from the sources listed and translated with AI (Claude); status and dates come from the vendor. The vendor’s statements are authoritative. Updated 1 Nov 2026, 15:36.

Where the information comes from

We continuously read the vendors’ official sources, community reports and trade media and summarise them in our own words, with a link to the source:

  • Microsoft: Windows release health (Windows 10/11, Server 2016 to 2025), Windows message center, known issues of Microsoft 365 Apps (Outlook, Excel, Word, PowerPoint), Edge, Intune, Autopilot, Windows 365 and Entra Connect, Microsoft KB articles with timelines, Exchange and Windows IT Pro blogs, optionally Microsoft 365 service health and message center
  • other vendors: Veeam KB, Citrix (known issues), Ubuntu and Debian (regressions), Broadcom (VMware), Fortinet, Cisco, Mozilla, Let’s Encrypt
  • community (title, short excerpt and link only, without the names of the authors): Microsoft Q&A, Microsoft Tech Community (discussions), Veeam R&D Forums, Eleven Forum
  • targeted web research with AI (Claude), e.g. on the updates of the month – this also finds discussions on Reddit and in forums; such entries are labelled as community reports until the vendor confirms them
  • early warning from trade media (title and link only): Born’s Tech and Windows World, BleepingComputer, AskWoody, Windows Latest, Windows Central, gHacks, The Windows Club, Deskmodder, Dr. Windows, WindowsArea, Frankys Web, heise online

Summary and translation with AI (Claude by Anthropic) – without any data of visitors.

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