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CVE-2026-23401: Linux, грешка в паметта

8.1

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, при специфични условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE When installing an emulated MMIO SPTE, do so *after* dropping/zapping the existing SPTE (if it's shadow-present). While commit a54aa15c6bda3 was right about it being impossible to convert a shadow-present SPTE to an MMIO SPTE due to a _guest_ write, it failed to account for writes to guest memory that are outside the scope of KVM. E.g. if host userspace modifies a shadowed gPTE to switch from a memslot to emulted MMIO and then the guest hits a relevant page fault, KVM will install the MMIO SPTE without first zapping the shadow-present SPTE. ------------[ cut here ]------------ is_shadow_present_pte(*sptep) WARNING: arch/x86/kvm/mmu/mmu.c:484 at mark_mmio_spte+0xb2/0xc0 [kvm], CPU#0: vmx_ept_stale_r/4292 Modules linked in: kvm_intel kvm irqbypass CPU: 0 UID: 1000 PID: 4292 Comm: vmx_ept_stale_r Not tainted 7.0.0-rc2-eafebd2d2ab0-sink-vm #319 PREEMPT Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:mark_mmio_spte+0xb2/0xc0 [kvm] Call Trace: <TASK> mmu_set_spte+0x237/0x440 [kvm] ept_page_fault+0x535/0x7f0 [kvm] kvm_mmu_do_page_fault+0xee/0x1f0 [kvm] kvm_mmu_page_fault+0x8d/0x620 [kvm] vmx_handle_exit+0x18c/0x5a0 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xc55/0x1c20 [kvm] kvm_vcpu_ioctl+0x2d5/0x980 [kvm] __x64_sys_ioctl+0x8a/0xd0 do_syscall_64+0xb5/0x730 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x47fa3f </TASK> ---[ end trace 0000000000000000 ]---

    Засегнати продукти

    • Linux Linux: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди 20656cd1f243d3a154aac5dd1b823110b6906fe1; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди ed5909992f344a7d3f4024261e9f751d9618a27d; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди fd28c5618699180cd69619801e9ae6a5266c0a22; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди 459158151a158a6703b49f3c9de0e536d8bd553f; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди 695320de6eadb75aaed8be1787c4ce4c189e4c7b; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди bce7fe59d43531623f3e43779127bfb33804925d; a54aa15c6bda3ca7e2f9e040ba968a1da303e24f преди aad885e774966e97b675dfe928da164214a71605
    • Linux Linux: 5.13; преди 5.13; 5.15.203 до 5.15.*; 6.1.168 до 6.1.*; 6.6.131 до 6.6.*; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; 7.0 до *
    • Red Hat Red Hat Enterprise Linux 10: 0:6.12.0-211.16.1.el10_2 преди *
    • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: 0:6.12.0-55.72.1.el10_0 преди *
    • Red Hat Red Hat Enterprise Linux 8: 0:4.18.0-553.123.1.rt7.464.el8_10 преди *
    • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: 0:4.18.0-372.191.1.el8_6 преди *
    • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service: 0:4.18.0-372.191.1.el8_6 преди *
    • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions: 0:4.18.0-372.191.1.el8_6 преди *
    • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service: 0:4.18.0-477.143.1.el8_8 преди *
    • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: 0:4.18.0-477.143.1.el8_8 преди *
    • Red Hat Red Hat Enterprise Linux 9: 0:5.14.0-687.10.1.el9_8 преди *
    • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions: 0:5.14.0-70.178.1.el9_0 преди *
    • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: 0:5.14.0-284.172.1.el9_2 преди *
    • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support: 0:5.14.0-427.124.1.el9_4 преди *
    • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
    • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: 0:5.14.0-570.112.1.el9_6 преди *
    • Red Hat Red Hat Enterprise Linux 6
    • Red Hat Red Hat Enterprise Linux 7

    Вид слабост

    История

    • 1 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-23401: Linux, грешка в паметта | freedomonline.bg