CVE-2024-55563

MediumCVSS 5.3/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://ariard.github.ioThird Party Advisory
https://bitcoincore.orgProduct
https://delvingbitcoin.org/t/full-disclosure-transaction-relay-throughput-overflow-attacks-against-off-chain-protocols/1305Issue Tracking
https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_ExposuresThird Party Advisory
https://gnusha.org/pi/bitcoindev/CALZpt+EptER=p+P7VN3QAb9n=dODA9_LnR9xZwWpRsdAwedv=w@mail.gmail.com/T/#uMailing List

Timeline

Published: Dec 9, 2024
Last modified: Jun 17, 2026
NVD status: Analyzed

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