Description
In Bitcoin Core through 26.0 and Bitcoin Knots before 25.1.knots20231115, datacarrier size limits can be bypassed by obfuscating data as code (e.g., with OP_FALSE OP_IF), as exploited in the wild by Inscriptions in 2022 and 2023. NOTE: although this is a vulnerability from the perspective of the Bitcoin Knots project, some others consider it "not a bug."
References
- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
- https://twitter.com/LukeDashjr/status/1732204937466032285
- https://github.com/bitcoin/bitcoin/pull/28408#issuecomment-1844981799
- https://github.com/bitcoinknots/bitcoin/blob/aed49ce8989334c364a219a6eb016a3897d4e3d7/doc/release-notes.md
- https://github.com/bitcoin/bitcoin/tags
- https://github.com/bitcoin/bitcoin/blob/65c05db660b2ca1d0076b0d8573a6760b3228068/src/kernel/mempool_options.h#L46-L53