CVE-2026-23401 (GCVE-0-2026-23401)

Vulnerability from cvelistv5 – Published: 2026-04-01 08:36 – Updated: 2026-06-30 12:06
VLAI
Title
KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE
Summary
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 ]---
Severity
8.1 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
Assigner
References
URL Tags
https://git.kernel.org/stable/c/20656cd1f243d3a15…
https://git.kernel.org/stable/c/ed5909992f344a7d3…
https://git.kernel.org/stable/c/fd28c5618699180cd…
https://git.kernel.org/stable/c/459158151a158a670…
https://git.kernel.org/stable/c/695320de6eadb75aa…
https://git.kernel.org/stable/c/bce7fe59d43531623…
https://git.kernel.org/stable/c/aad885e774966e97b…
https://access.redhat.com/security/cve/CVE-2026-23401 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2453803 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:15883 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19569 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13936 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:20593 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13932 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:14339 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19568 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13577 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:14230 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19521 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13578 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:14137 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19875 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Linux Linux Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < 20656cd1f243d3a154aac5dd1b823110b6906fe1 (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < ed5909992f344a7d3f4024261e9f751d9618a27d (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < fd28c5618699180cd69619801e9ae6a5266c0a22 (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < 459158151a158a6703b49f3c9de0e536d8bd553f (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < 695320de6eadb75aaed8be1787c4ce4c189e4c7b (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < bce7fe59d43531623f3e43779127bfb33804925d (git)
Affected: a54aa15c6bda3ca7e2f9e040ba968a1da303e24f , < aad885e774966e97b675dfe928da164214a71605 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux BaseOS (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux BaseOS (v. 8)     cpe:/o:redhat:enterprise_linux:8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS AUS (v.8.6)     cpe:/o:redhat:rhel_aus:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.8.6)     cpe:/o:redhat:rhel_e4s:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS TUS (v.8.6)     cpe:/o:redhat:rhel_tus:8.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.8.8)     cpe:/o:redhat:rhel_e4s:8.8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS TUS (v.8.8)     cpe:/o:redhat:rhel_tus:8.8::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.9.0)     cpe:/o:redhat:rhel_e4s:9.0::baseos
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Red Hat Red Hat Enterprise Linux BaseOS E4S (v.9.2)     cpe:/o:redhat:rhel_e4s:9.2::baseos
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v.9.4)     cpe:/o:redhat:rhel_eus:9.4::baseos
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Red Hat Red Hat Enterprise Linux BaseOS EUS (v.9.6)     cpe:/o:redhat:rhel_eus:9.6::baseos
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Red Hat Red Hat Enterprise Linux BaseOS (v. 9)     cpe:/o:redhat:enterprise_linux:9::baseos
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux CRB (v. 8)     cpe:/a:redhat:enterprise_linux:8::crb
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Red Hat Red Hat CodeReady Linux Builder EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::crb
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Red Hat Red Hat CodeReady Linux Builder EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::crb
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Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)     cpe:/a:redhat:enterprise_linux:9::crb
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Red Hat Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux Real Time for NFV (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux NFV (v. 8)     cpe:/a:redhat:enterprise_linux:8::nfv
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Red Hat Red Hat Enterprise Linux NFV E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::nfv
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Red Hat Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::nfv
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Red Hat Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::nfv
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Red Hat Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::nfv
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Red Hat Red Hat Enterprise Linux Real Time for NFV (v. 9)     cpe:/a:redhat:enterprise_linux:9::nfv
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Red Hat Red Hat Enterprise Linux Real Time EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux Real Time (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux RT (v. 8)     cpe:/a:redhat:enterprise_linux:8::realtime
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Red Hat Red Hat Enterprise Linux Real Time E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::realtime
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Red Hat Red Hat Enterprise Linux Real Time E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::realtime
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Red Hat Red Hat Enterprise Linux Real Time EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::realtime
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Red Hat Red Hat Enterprise Linux Real Time EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::realtime
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Red Hat Red Hat Enterprise Linux Real Time (v. 9)     cpe:/a:redhat:enterprise_linux:9::realtime
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.0::appstream"
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            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
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            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
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            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_aus:8.6::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS AUS (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_e4s:8.6::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS E4S (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_tus:8.6::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS TUS (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_e4s:8.8::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS E4S (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_tus:8.8::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS TUS (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_e4s:9.0::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS E4S (v.9.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_e4s:9.2::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_eus:9.4::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS EUS (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_eus:9.6::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9::baseos"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux BaseOS (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CRB (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.4::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat CodeReady Linux Builder EUS (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat CodeReady Linux Builder EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux NFV (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.0::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux NFV E4S (v.9.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.4::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::nfv"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time for NFV (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux RT (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.0::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time E4S (v.9.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.4::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time EUS (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::realtime"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Real Time (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-04-01T00:00:00.000Z",
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    "dateUpdated": "2026-06-30T12:06:45.035Z",
    "state": "PUBLISHED"
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While commit a54aa15c6bda3 was\\nright about it being impossible to convert a shadow-present SPTE to an\\nMMIO SPTE due to a _guest_ write, it failed to account for writes to guest\\nmemory that are outside the scope of KVM.\\n\\nE.g. if host userspace modifies a shadowed gPTE to switch from a memslot\\nto emulted MMIO and then the guest hits a relevant page fault, KVM will\\ninstall the MMIO SPTE without first zapping the shadow-present SPTE.\\n\\n  ------------[ cut here ]------------\\n  is_shadow_present_pte(*sptep)\\n  WARNING: arch/x86/kvm/mmu/mmu.c:484 at mark_mmio_spte+0xb2/0xc0 [kvm], CPU#0: vmx_ept_stale_r/4292\\n  Modules linked in: kvm_intel kvm irqbypass\\n  CPU: 0 UID: 1000 PID: 4292 Comm: vmx_ept_stale_r Not tainted 7.0.0-rc2-eafebd2d2ab0-sink-vm #319 PREEMPT\\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\\n  RIP: 0010:mark_mmio_spte+0xb2/0xc0 [kvm]\\n  Call Trace:\\n   \u003cTASK\u003e\\n   mmu_set_spte+0x237/0x440 [kvm]\\n   ept_page_fault+0x535/0x7f0 [kvm]\\n   kvm_mmu_do_page_fault+0xee/0x1f0 [kvm]\\n   kvm_mmu_page_fault+0x8d/0x620 [kvm]\\n   vmx_handle_exit+0x18c/0x5a0 [kvm_intel]\\n   kvm_arch_vcpu_ioctl_run+0xc55/0x1c20 [kvm]\\n   kvm_vcpu_ioctl+0x2d5/0x980 [kvm]\\n   __x64_sys_ioctl+0x8a/0xd0\\n   do_syscall_64+0xb5/0x730\\n   entry_SYSCALL_64_after_hwframe+0x4b/0x53\\n  RIP: 0033:0x47fa3f\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/x86/kvm/mmu/mmu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"20656cd1f243d3a154aac5dd1b823110b6906fe1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"ed5909992f344a7d3f4024261e9f751d9618a27d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"fd28c5618699180cd69619801e9ae6a5266c0a22\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"459158151a158a6703b49f3c9de0e536d8bd553f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"695320de6eadb75aaed8be1787c4ce4c189e4c7b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"bce7fe59d43531623f3e43779127bfb33804925d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a54aa15c6bda3ca7e2f9e040ba968a1da303e24f\",\"lessThan\":\"aad885e774966e97b675dfe928da164214a71605\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/x86/kvm/mmu/mmu.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.168\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.131\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.80\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.21\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.11\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red 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  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.