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().
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < b7fefb393a926bdfe445c63b4091185ed7da2733; >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < 165b08d2d1346dce5ed43db65e10f3194b9ae2fe; >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < 11d347b7edf5093d69aca72317300798a32bfd6b; >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < a3f0981a5a0e0bd51ad74cc7d9eed32294b24002; >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < 9efe23568806d1cd06f7d146f9b3037b8d585a9f; >= d20c796ca3709801f8a7fa36e8770a3dd8ebd34e, < b53ab5167a81537777ac780bbd93d32613aa3bda |
| Linux | Linux | 5.19 |
References
- https://git.kernel.org/stable/c/11d347b7edf5093d69aca72317300798a32bfd6b
- https://git.kernel.org/stable/c/165b08d2d1346dce5ed43db65e10f3194b9ae2fe
- https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9fPatch
- https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002Patch
- https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bdaPatch
- https://git.kernel.org/stable/c/b7fefb393a926bdfe445c63b4091185ed7da2733
Timeline
- Published
- May 27, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Undergoing Analysis