Medium severity5.3NVD Advisory· Published Dec 9, 2024· Updated Jun 17, 2026
CVE-2024-55563
CVE-2024-55563
Description
Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:bitcoin:bitcoin_core:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:bitcoin:bitcoin_core:*:*:*:*:*:*:*:*range: <=27.2
- (no CPE)range: <=27.2
- Bitcoin Core/Bitcoin Coredescription
Patches
Vulnerability mechanics
References
5- ariard.github.ionvdThird Party Advisory
- en.bitcoin.it/wiki/Common_Vulnerabilities_and_ExposuresnvdThird Party Advisory
- bitcoincore.orgnvdProduct
- delvingbitcoin.org/t/full-disclosure-transaction-relay-throughput-overflow-attacks-against-off-chain-protocols/1305nvdIssue Tracking
- gnusha.org/pi/bitcoindev/CALZpt+EptER=p+P7VN3QAb9n=dODA9_LnR9xZwWpRsdAwedv=w@mail.gmail.com/T/nvdMailing List
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