KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12
In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12 svm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB. However, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and clearing clean bits in vmcb12 is not architecturally defined. Move vmcb_mark_dirty() to callers and drop it for vmcb12. This also facilitates incoming refactoring that does not pass the entire VMCB to svm_copy_lbrs().
CVE-2026-46071
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-2026-46071
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": "d20c796ca3709801f8a7fa36e8770a3dd8ebd34e",
"lessThan": "165b08d2d1346dce5ed43db65e10f3194b9ae2fe",
"versionType": "git"
},
{
"status": "affected",
"version": "d20c796ca3709801f8a7fa36e8770a3dd8ebd34e",
"lessThan": "11d347b7edf5093d69aca72317300798a32bfd6b",
"versionType": "git"
},
{
"status": "affected",
"version": "d20c796ca3709801f8a7fa36e8770a3dd8ebd34e",
"lessThan": "a3f0981a5a0e0bd51ad74cc7d9eed32294b24002",
"versionType": "git"
},
{
"status": "affected",
"version": "d20c796ca3709801f8a7fa36e8770a3dd8ebd34e",
"lessThan": "9efe23568806d1cd06f7d146f9b3037b8d585a9f",
"versionType": "git"
},
{
"status": "affected",
"version": "d20c796ca3709801f8a7fa36e8770a3dd8ebd34e",
"lessThan": "b53ab5167a81537777ac780bbd93d32613aa3bda",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kvm/svm/nested.c",
"arch/x86/kvm/svm/svm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.27",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.4",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/svm/nested.c",
"arch/x86/kvm/svm/svm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46071
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46325 · Revision 1
- Added to Heist Feed
- Publisher date