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[LTS 9.2] CVE-2026-23401 #1357

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Merged
PlaidCat merged 1 commit into from
Jun 24, 2026
Merged

[LTS 9.2] CVE-2026-23401 #1357

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15 changes: 9 additions & 6 deletions arch/x86/kvm/mmu/mmu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2792,12 +2792,6 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
pgprintk("%s: spte %llx write_fault %d gfn %llx\n", __func__,
*sptep, write_fault, gfn);

if (unlikely(is_noslot_pfn(pfn))) {
vcpu->stat.pf_mmio_spte_created++;
mark_mmio_spte(vcpu, sptep, gfn, pte_access);
return RET_PF_EMULATE;
}

if (is_shadow_present_pte(*sptep)) {
/*
* If we overwrite a PTE page pointer with a 2MB PMD, unlink
Expand All @@ -2819,6 +2813,15 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
was_rmapped = 1;
}

if (unlikely(is_noslot_pfn(pfn))) {
vcpu->stat.pf_mmio_spte_created++;
mark_mmio_spte(vcpu, sptep, gfn, pte_access);
if (flush)
kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn,
KVM_PAGES_PER_HPAGE(level));
return RET_PF_EMULATE;
}

wrprot = make_spte(vcpu, sp, slot, pte_access, gfn, pfn, *sptep, prefetch,
true, host_writable, &spte);

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