medium5.5
CVE-2026-46071
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…
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.19 before 6.18.27 from 6.19 before 7.0.4 |
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/11d347b7edf5093d69aca72317300798a32bfd6b
- https://git.kernel.org/stable/c/165b08d2d1346dce5ed43db65e10f3194b9ae2fe
- https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f
- https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002
- https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda
- https://git.kernel.org/stable/c/b7fefb393a926bdfe445c63b4091185ed7da2733