KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails
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.
CVE-2026-98863
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98863
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "671ddc700fd08b94967b1e2a937020e30c838609",
"lessThan": "525694a6021ec6c8f7ce1f38acdf2dd77698fec1",
"versionType": "git"
},
{
"status": "affected",
"version": "671ddc700fd08b94967b1e2a937020e30c838609",
"lessThan": "942192dbcd3a06695ef6b31cf10a41a21cf014d8",
"versionType": "git"
},
{
"status": "affected",
"version": "671ddc700fd08b94967b1e2a937020e30c838609",
"lessThan": "10180a277549339020b08000206092c07e0bff5a",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kvm/x86.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/x86.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98863
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38756 · Revision 1
- Added to Heist Feed
- Publisher date