Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks

CVE-2026-40880: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks Summary A logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By carefully submitting a transaction that is valid for height H+1 but invalid fo...

RHEL 2.1 : zebra (RHSA-2003:305)

Updated zebra packages that close a locally-exploitable and a remotely-exploitable denial of service vulnerability are now available. Zebra an open source implementation of TCP/IP routing software. Jonny Robertson reported that Zebra can be remotely crashed if a Zebra password has been enabled an...