Resource exhaustion in Bitcoin Core
CVE-2024-55563
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (50.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures (Third Party Advisory)
- bitcoincore.org (Product)
- delvingbitcoin.org/t/full-disclosure-transaction-relay-throughput-overflow-atta… (Issue Tracking)
- gnusha.org/pi/bitcoindev/CALZpt+EptER=p+P7VN3QAb9n=dODA9_LnR9xZwWpRsdAwedv=w@ma… (Mailing List)
- ariard.github.io (Third Party Advisory)
Frequently asked questions
- What is CVE-2024-55563?
- CVE-2024-55563 is a medium-severity vulnerability in Bitcoin Core, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2024-12-09.
- How severe is CVE-2024-55563?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2024-55563 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.