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CVE-2022-2196 is a regression in the Linux kernel KVM Intel nested-virtualization implementation (nVMX). KVM failed to issue an Indirect Branch Prediction Barrier (IBPB) when transitioning from an L2 nested guest back to its L1 guest. Because L1 and L2 shared guest-user and guest-kernel branch-prediction modes, an L2 guest could train indirect-branch predictions that influence indirect branches subsequently executed by L1. This permits Spectre v2 speculative-execution attacks against the L1 guest.
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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.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux KVM nested-virtualization speculative-execution isolation flaw enabling Spectre v2 attacks.
KVM nested-virtualization speculative-execution isolation weakness.
KVM nested-virtualization branch-predictor barrier omission enabling Spectre v2 attacks.
KVM nested-virtualization flaw allowing Spectre v2 attack conditions due to a missing IBPB.
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.