python3.9 (3.9.2-1+deb11u6) bullseye-security; urgency=medium

python3.9 (3.9.2-1+deb11u6) bullseye-security; urgency=medium

  * Revert fixes for CVE-2025-15366 and CVE-2025-15367. It was found that
    those changes break backward compatibility, and upstream didn't backport
    it to any branch. More details can be found in discussions on the upstream
    bugtracker (issues and merge requests).
  * Apply upstream patch for the following CVE:
    - CVE-2026-6100: Use-after-free (UAF) was possible in the
      `lzma.LZMADecompressor` and `bz2.BZ2Decompressor` when a memory
      allocation fails with a `MemoryError` and the decompression instance is
      re-used. This scenario can be triggered if the process is under memory
      pressure.

[dgit import unpatched python3.9 3.9.2-1+deb11u6]