In July 2023, NIST’s Crypto Publication Review Board initiated a review process for NIST Special Publication (SP) 800-135 Revision 1, Recommendation for Existing Application-Specific Key Derivation Functions (2011) and received public comments.
In May 2024 NIST proposed revising SP 800-135 Rev. 1. No public comments were received in response to that proposal.
NIST has decided to revise SP 800-135 Rev. 1. See the full announcement for more details, links to comments received, and ways to monitor future developments.