Bitcoin Core fixes TCP urgent-data flaw affecting non-Linux nodes

What sources claim

• Bitcoin Core stated that on platforms other than Linux a malicious peer could crash a node by sending TCP urgent (out-of-band) data, and that fixes shipped in versions 29.5, 30.4, 31.2 and 32.1.
• Bitcoin Core said the issue is rated Medium severity and easily discoverable, and that Linux users are not affected because it only affects the select() socket code path.
• Bitcoin Core said the issue was discovered through an automated LLM scan as part of Elias Rohrer's Project Loupe at Spiral, and the finding was validated and surfaced to the team by Gregory Sanders.

Still unresolved

• Which release channels or distributions beyond the listed Bitcoin Core versions carry the fix has not been spelled out by the project.
• What the malformed TCP urgent-data sequence looks like in practice, and whether an exploit has been observed in the wild, is not stated in the disclosure.

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