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CVE-2021-47153 affects the Linux kernel Intel ICH SMBus (i2c-i801) driver after interrupt support was introduced. When a timed-out I2C transaction triggers bus recovery, setting the controller KILL bit generates an interrupt. The i801 interrupt handler is not prepared to distinguish this recovery interrupt from successful transaction completion and processes it as the latter. For block transactions, this incorrect state handling can result in an out-of-range memory access. The fix suppresses interrupts while resetting the I2C bus and re-enables them for the next transaction.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel i2c-i801 bus-reset interrupt-handling vulnerability.
Linux kernel i2c-i801 bus-reset interrupt handling flaw.
Linux kernel i2c-i801 bus-reset interrupt-handling vulnerability.
Linux kernel Intel I801 I2C driver bus-reset interrupt-handling vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.