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CVE-2024-39499 is a speculative out-of-bounds read issue in the Linux kernel VMCI component. A user-space-controlled event value is passed through an event message to event_deliver(), where it is used as an index without speculative-execution sanitization. Although normal control flow may constrain valid event values, speculative execution could transiently use an attacker-influenced out-of-range index and expose data through a microarchitectural side channel. The fix sanitizes the event index before it is used.
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No public exploit code observed for this vulnerability.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel VMCI issue involving speculative information leakage through insufficient event sanitization in event_deliver().
A medium-severity Linux kernel VMCI flaw in event_deliver() where an unsanitized user-controlled event value could be used as an array index, creating a potential speculative-execution information leak.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.