CVE-2026-23401

linux kernel

TLP:CLEAR

csirt@kutim:~/threat-intel/cve/CVE-2026-23401

Katalog CVE

CVSS 5.5 · Medium EPSS 0,18%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

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 ]---

Rincian

Terbit di NVD
1 April 2026
Terakhir diubah
15 Juli 2026
Status NVD
Modified
CVSS 3.1
5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE)
CWE-416: Use After Free
EPSS (30 hari)
0,18% peluang dieksploitasi; lebih tinggi dari 7,4% CVE lain

Produk dan versi terdampak

VendorProdukVersi terdampak
linux linux kernel Versi 5.13.1 hingga sebelum 5.15.203
linux linux kernel Versi 5.16 hingga sebelum 6.1.168
linux linux kernel Versi 6.2 hingga sebelum 6.6.131
linux linux kernel Versi 6.7 hingga sebelum 6.12.80
linux linux kernel Versi 6.13 hingga sebelum 6.18.21
linux linux kernel Versi 6.19 hingga sebelum 6.19.11
linux linux kernel Versi 5.13
linux linux kernel Versi 7.0 rc1
linux linux kernel Versi 7.0 rc2
linux linux kernel Versi 7.0 rc3
linux linux kernel Versi 7.0 rc4
linux linux kernel Versi 7.0 rc5
linux linux kernel Versi 7.0 rc6
linux linux kernel Versi 7.0 rc7

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.