I would guess it's probably private Russian companies that sold access to the data to anyone including Iranians or Russians sympathetic to the movement who passed it to Iranians and that is being spun as part of the anti-Russia hysteria as the Russian military itself giving such data directly to Iran. It's possible they did that, based as fuck if they did of course but I have serious doubts the Russians were burning bridges with the zionist regime that early given their attempts to maintain ties with anyone not directly part of NATO.

the source is "a person familiar with the matter and two European defense officials" so.... probably a load of shit

but if it's true, good

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The data was passed through members of Iran’s Islamic Revolutionary Guard Corps, who were embedded with the Houthis in Yemen, one of the people said.

So Russia gave satellite data to Iran who then passed it on to Yemen, according to the article. Gives them plausible deniability as it's not a direct hand over if data from Russia to Yemen.

Earlier this month, Russian arms dealer Viktor Bout, who had recently been released from a U.S. prison in a prisoner swap with Moscow was trying to broker the sale of about $10 million worth of automatic small arms to the Houthis, The Wall Street Journal has reported. It was unclear whether the sale had been initiated or blessed by the Kremlin.

Isn't this the prisoner that Russia got in exchange for Brittney Griner, the US basketball player who was arrested in the first place for carrying marijuana in her personal belongings to a country where it is illegal? Amazing, the US can't stop winning with these prisoner exchange deals.