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CVE-2023-30456 is an improper input-validation flaw in the x86_64 Linux KVM nested VMX (nVMX) implementation. Linux kernel versions before 6.2.8 lack required consistency checks for the CR0 and CR4 control registers in the nested-virtualization code in arch/x86/kvm/vmx/nested.c.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux KVM nested VMX flaw caused by missing CR0 and CR4 consistency checks.
Linux KVM nested VMX vulnerability caused by missing CR0 and CR4 consistency checks.
Linux kernel KVM nested-VMX vulnerability caused by missing CR0 and CR4 consistency checks.
Linux kernel KVM nested VMX vulnerability due to missing CR0 and CR4 consistency checks.
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.