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CVE-2023-5090 is an improper access-control flaw in the Linux kernel KVM implementation for AMD Secure Virtual Machine (SVM) virtualization. The flaw is in svm_set_x2apic_msr_interception(), where insufficient validation of x2APIC MSR interception state can occur when a guest resets its APIC. This can allow a guest to directly access host x2APIC model-specific registers that should remain intercepted and inaccessible to the guest.
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10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An improper validation flaw in Linux KVM SVM that permits direct access to host x2APIC MSRs.
A vulnerability referenced in the Red Hat kernel security advisory; the advisory provides no further technical details for this CVE.
Linux kernel KVM/SVM improper-check flaw allowing direct access to host x2APIC MSRs.
Linux kernel KVM SVM validation flaw permitting direct access to host x2APIC MSRs.
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.