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CVE-2024-39483 is a flaw in the Linux kernel KVM implementation for AMD Secure Virtual Machine (SVM) virtual-NMI handling. KVM could issue a WARN when an NMI window was requested while virtual-NMI support was enabled, even when NMIs were not masked. This can occur when KVM cannot immediately inject an NMI because the virtual CPU is in an STI interrupt shadow or is executing with GIF cleared. The corrected logic emits the warning only when NMIs are actually masked because the virtual CPU is already handling an NMI.
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6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel KVM/SVM vulnerability concerning vNMI and NMI-window handling when NMIs are masked.
A Linux kernel KVM SVM issue involving warning behavior for virtual NMI and NMI-window conditions when NMIs are masked.
Linux kernel KVM/SVM issue involving virtual NMI and NMI-window handling when NMIs are masked.
A Linux kernel KVM/SVM issue involving handling of virtual NMIs and NMI-window conditions.
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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.