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CVE-2026-74607: Linux

8.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Serialize accesses to the owner and mirror list with separate lock Interaction between KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM and KVM_CAP_VM_COPY_ENC_CONTEXT_FROM can cause two separate issues: - in sev_migrate_from(), when the destination KVM is a mirror, the mirror entry is moved from the source's list to the owner's mirror_vms list, without holding the owner's lock unlike other writers of the owner's mirror list (sev_vm_copy_enc_context_from(), sev_vm_destroy()). A concurrent COPY or destroy can race with sev_migrate_from() and corrupt the list. - In sev_vm_destroy(), the *owner* is still active and could receive concurrently a KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM that causes sev->enc_context_owner to change. In this case the incorrect VM receives kvm_put_kvm(). The second issue needs particular care because the owner could disappear altogether (even though the race window is impossibly small) between reading it and locking it. There is thus no way to perform the checks under the owner lock without putting struct kvm under SLAB_TYPESAFE_BY_RCU (which would allow kvm_get_kvm_safe() under RCU critical section). It is much simpler to just use a global lock, since the critical sections are so small and the new lock is always a leaf lock.

Засегнати продукти

  • Linux Linux: b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди 7943ec3a6d0e7e0a2eb4943300bce089ac3e8c3e; b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди 28afde1edbd8b20058cbf4d75fb57876471ec334; b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди 328ab4fabe05af004d886659f8744076e320ddce; b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди 47976eaaf0a4eb46dade48b3246779090db9e3ec; b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди d728baba0f20e49439fc7831bf3e4e7dee82161a; b2125513dfc0dd0ec5a9605138a3c356592cfb73 преди 1d78d33275ef2a16c6d080910b291d0a97a0e613
  • Linux Linux: 5.18; преди 5.18; 6.1.184 до 6.1.*; 6.6.153 до 6.6.*; 6.12.105 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

История

  • 22 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74607: Linux | freedomonline.bg