CVE-2026-98863KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 671ddc700fd08b94967b1e2a937020e30c838609 before 525694a6021ec6c8f7ce1f38acdf2dd77698fec1; from 671ddc700fd08b94967b1e2a937020e30c838609 before 942192dbcd3a06695ef6b31cf10a41a21cf014d8; from 671ddc700fd08b94967b1e2a937020e30c838609 before 10180a277549339020b08000206092c07e0bff5a | CNA record |
References
- https://git.kernel.org/stable/c/525694a6021ec6c8f7ce1f38acdf2dd77698fec1
- https://git.kernel.org/stable/c/942192dbcd3a06695ef6b31cf10a41a21cf014d8
- https://git.kernel.org/stable/c/10180a277549339020b08000206092c07e0bff5a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.