putty (0.81-1) unstable; urgency=high

  PuTTY 0.81 fixes a critical vulnerability CVE-2024-31497 in the use of
  521-bit ECDSA keys (ecdsa-sha2-nistp521). If you have used a 521-bit ECDSA
  private key with any previous version of PuTTY, consider the private key
  compromised: remove the public key from authorized_keys files, and
  generate a new key pair.

  However, this only affects that one algorithm and key size. No other size
  of ECDSA key is affected, and no other key type is affected.

 -- Colin Watson <cjwatson@debian.org>  Mon, 15 Apr 2024 23:41:28 +0100