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CVE-2026-72284

Estado: RecibidaAlta (7.1)—

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs

Ignore KVM's internal "service pending PV EOI" request if the vCPU has disabled PV EOIs since the request was made. Asserting that PV EOIs are enabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e. if pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables PV EOIs.

Detalles técnicos trazas, registros y código del informe original
  kernel BUG at arch/x86/kvm/lapic.c:3338!
  Oops: invalid opcode: 0000 [#1] SMP
  CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
  RIP: 0010:kvm_lapic_sync_from_vapic+0x12b/0x140 [kvm]
  Call Trace:
   <TASK>
   kvm_arch_vcpu_ioctl_run+0x1075/0x1c30 [kvm]
   kvm_vcpu_ioctl+0x2d5/0x980 [kvm]
   __x64_sys_ioctl+0x8a/0xd0
   do_syscall_64+0xb5/0xb40
   entry_SYSCALL_64_after_hwframe+0x4b/0x53
   </TASK>
  Modules linked in: kvm_intel kvm irqbypass
  ---[ end trace 0000000000000000 ]---

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad local (AV:L/PR:N) en kernel Linux que causa panic/DoS; acceso local sin privilegios requiere T1068, impacto de disponibilidad por crash del sistema (A:H).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-72284",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "038b9ce6fafda1babd1e33d52cbc6039747a6d87",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "8e9f7a95279bf608cf4c331ed89612e28c04564f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "ebd7845ca0471d251a1cb48d84eb165aff5b7123",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "97542f15dc4cf6cd3fdc035e482dca54246ddf48",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
              "lessThan": "9285e4070df2c40585c3d7ec9571faa7a2b97e17",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/x86/kvm/lapic.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.6",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/x86/kvm/lapic.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:59.240",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/038b9ce6fafda1babd1e33d52cbc6039747a6d87",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e9f7a95279bf608cf4c331ed89612e28c04564f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9285e4070df2c40585c3d7ec9571faa7a2b97e17",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/97542f15dc4cf6cd3fdc035e482dca54246ddf48",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ebd7845ca0471d251a1cb48d84eb165aff5b7123",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs\n\nIgnore KVM's internal \"service pending PV EOI\" request if the vCPU has\ndisabled PV EOIs since the request was made.  Asserting that PV EOIs are\nenabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e.\nif pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables\nPV EOIs.\n\n  kernel BUG at arch/x86/kvm/lapic.c:3338!\n  Oops: invalid opcode: 0000 [#1] SMP\n  CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n  RIP: 0010:kvm_lapic_sync_from_vapic+0x12b/0x140 [kvm]\n  Call Trace:\n   <TASK>\n   kvm_arch_vcpu_ioctl_run+0x1075/0x1c30 [kvm]\n   kvm_vcpu_ioctl+0x2d5/0x980 [kvm]\n   __x64_sys_ioctl+0x8a/0xd0\n   do_syscall_64+0xb5/0xb40\n   entry_SYSCALL_64_after_hwframe+0x4b/0x53\n   </TASK>\n  Modules linked in: kvm_intel kvm irqbypass\n  ---[ end trace 0000000000000000 ]---"
    }
  ],
  "lastModified": "2026-08-17T06:18:31.057",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}