CVE-2025-54605 - Disk filling from invalid blocks

Headline:
CVE-2025-54605 - Disk filling from invalid blocks

Summary:
This lead was identified from Bitcoin Core Blog. It has been saved for accountability coverage and should be reviewed against the original source before expansion.

What the record says:
The source headline is: CVE-2025-54605 - Disk filling from invalid blocks. The source summary says: Disclosure of the details of a log-filling bug which allowed an attacker to cause a victim node to fill up its disk space by repeatedly sending invalid blocks. Exploitability of this bug is limited, as it would take a long time before it would cause the victim to run out of disk space. A fix was released on October 10th 2025 in Bitcoin Core v30.0. This issue is considered Low severity. Details A node would unconditionally log when receiving a block that fails basic sanity checks, or when receiving a block that branches off prior to the last checkpoint. By repeatedly sending such an invalid block to a victim node, an attacker could cause the victim to run out of disk space. This issue was fixed by implementing log rate-limiting across the board, also preventing future issues of the same type from happening. Attribution Niklas Goegge discovered this bug and disclosed it responsibly. Eugene

Why it matters:
This may be relevant to public accountability, consumer protection, government oversight, fraud monitoring, or financial transparency depending on the source record.

What is not yet proven:
This draft should not be treated as proof beyond what the linked source directly supports. Avoid adding accusations, private information, or copied text from the original source.

Source:
https://bitcoincore.org/en/2025/10/24/disclose-cve-2025-54605/

AI writer note: OPENAI_API_KEY is empty, so this was generated with the built-in safe fallback writer.