Bitcoin Core 0.12.0 through 0.21.1 does not properly implement the replacement policy specified in BIP125, which makes it easier for attackers to trigger a loss of funds, or a denial of service attack against downstream projects such as Lightning network nodes. An unconfirmed child transaction with nSequence = 0xff_ff_ff_ff, spending an unconfirmed parent with nSequence <= 0xff_ff_ff_fd, should be replaceable because there is inherited signaling by the child transaction. However, the actual PreChecks implementation does not enforce this. Instead, mempool rejects the replacement attempt of the unconfirmed child transaction.
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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2021-05-13T21:03:38
Updated: 2024-08-03T23:10:31.041Z
Reserved: 2021-04-29T00:00:00
Link: CVE-2021-31876
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-05-13T22:15:07.547
Modified: 2024-11-21T06:06:24.633
Link: CVE-2021-31876
Redhat
No data.