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CVE-2022-39189 is a context-switching race condition in the x86 KVM subsystem of the Linux kernel before 5.18.17. The flaw is in the preemption handling path, including kvm_steal_time_set_preempted(), where TLB flush operations can be mishandled in certain KVM_VCPU_PREEMPTED situations. This can leave guest address-translation state improperly synchronized and enables a user within an affected KVM guest to compromise the guest kernel or cause guest malfunctioning.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux KVM TLB-flush handling vulnerability that can cause guest malfunctions.
Linux KVM TLB-flush handling flaw affecting guests.
Linux KVM TLB-flush handling flaw that can cause guest malfunction.
KVM TLB flush handling flaw that can cause guest malfunction.
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.