CVE-2026-98863
UnratedPublished 2026-10-18
CVSS
—
Unrated
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-98863?
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails Re-pend GET_NESTED_STATE_PAGES before exiting to userspace if getting the nested pages fails in the KVM_RUN path. If userspace re-runs the vCPU, and vmcs02 holds valid PFNs from the *previous* run of L2, then KVM could re-enter L2 with stale, unpinned PFNs mapped into e.g. the vAPIC page. Note, both SVM and VMX (as of commit 11722439fb20 ("KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit") ensure the request is cleared on VM-Exit (including the "forced" case), i.e. there is no risk of double-mapping due to emulated VMLAUNCH/VMRESUME/VMRUN *and* the request trying to map the nested pages.
CVSS Score Explained
No CVSS score available for this CVE yet.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://git.kernel.org/stable/c/10180a277549339020b08000206092c07e0bff5a
- ›https://git.kernel.org/stable/c/525694a6021ec6c8f7ce1f38acdf2dd77698fec1
- ›https://git.kernel.org/stable/c/942192dbcd3a06695ef6b31cf10a41a21cf014d8
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