Description
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().
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f Patch
- git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002 Patch
- git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda Patch
- git.kernel.org/stable/c/11d347b7edf5093d69aca72317300798a32bfd6b
- git.kernel.org/stable/c/165b08d2d1346dce5ed43db65e10f3194b9ae2fe
- git.kernel.org/stable/c/b7fefb393a926bdfe445c63b4091185ed7da2733
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 14 November 2026
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