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Debian 11 tzdata and libdatetime-timezone-perl Updates Released

Debian 11 tzdata and libdatetime-timezone-perl Updates Released

First seen 7 May 2026, 14:22 UTC • •
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ThreatCluster AI
ThreatCluster •May 8, 2026 at 14:08 UTC
  • •Debian 11 tzdata update addresses British Columbia's timezone change.
  • •Leap second list updated to prevent expiration issues.
  • •Critical update for libdatetime-timezone-perl released, requiring immediate upgrades.

On May 7, 2026, Debian released important updates for tzdata and libdatetime-timezone-perl affecting Debian 11 (bullseye). The tzdata update addresses a significant timezone change in British Columbia, which transitioned to permanent -07 on March 9, 2026, eliminating the fallback to -08 in November. Additionally, the leap second list was updated to prevent expiration by the end of June. The libdatetime-timezone-perl update resolves critical issues in version 1:2.47-1+2026b. Users are strongly advised to upgrade both tzdata and libdatetime-timezone-perl packages to maintain system integrity and avoid potential disruptions.

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Timeline

2026-03-09
British Columbia adopts permanent -07 timezone
British Columbia officially moved to a permanent -07 timezone, impacting future time changes.
Linuxsecurity
2026-05-07
Debian releases tzdata update DLA-4569
Debian 11 tzdata updated to version 2026b-0+deb11u1 to fix timezone issues and leap second list.
Linuxsecurity
2026-05-07
Debian releases libdatetime-timezone-perl update DLA-4570
Critical update for libdatetime-timezone-perl issued, fixing vulnerabilities in version 1:2.47-1+2026b.
Linuxsecurity

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