CVE-2024-53196
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Don't retire aborted MMIO instruction
Returning an abort to the guest for an unsupported MMIO access is a documented feature of the KVM UAPI. Nevertheless, it's clear that this plumbing has seen limited testing, since userspace can trivially cause a WARN in the MMIO return:
The splat is complaining that KVM is advancing PC while an exception is pending, i.e. that KVM is retiring the MMIO instruction despite a pending synchronous external abort. Womp womp.
Fix the glaring UAPI bug by skipping over all the MMIO emulation in case there is a pending synchronous exception.
Leer descripción completaMostrar menos
Note that while userspace is capable of pending an asynchronous exception (SError, IRQ, or FIQ), it is still safe to retire the MMIO instruction in this case as (1) they are by definition asynchronous, and (2) KVM relies on hardware support for pending/delivering these exceptions instead of the software state machine for advancing PC.
Detalles técnicos trazas, registros y código del informe original
WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 Call trace: kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133 kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487 __do_sys_ioctl fs/ioctl.c:51 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.22%
- Percentil entre todas las CVEs puntuadas: 12
- Fecha de la puntuación: 6/10/2026
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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/1e46460efe1ef9a31748de7675ff8fe0d8601af2
- https://git.kernel.org/stable/c/6af853cf5f897d55f42e9166f4db50e84e404fb3
- https://git.kernel.org/stable/c/d0571c3add987bcb69c2ffd7a70c998bf8ce60fb
- https://git.kernel.org/stable/c/e735a5da64420a86be370b216c269b5dd8e830e2
- https://git.kernel.org/stable/c/ea6b5d98fea4ee8cb443ea98fda520909e90d30e
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
JSON original (NVD)
Mostrar
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"id": "CVE-2024-53196",
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"source": "nvd@nist.gov",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Don't retire aborted MMIO instruction\n\nReturning an abort to the guest for an unsupported MMIO access is a\ndocumented feature of the KVM UAPI. Nevertheless, it's clear that this\nplumbing has seen limited testing, since userspace can trivially cause a\nWARN in the MMIO return:\n\n WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n Call trace:\n kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133\n kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487\n __do_sys_ioctl fs/ioctl.c:51 [inline]\n __se_sys_ioctl fs/ioctl.c:893 [inline]\n __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49\n el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132\n do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151\n el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712\n el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730\n el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598\n\nThe splat is complaining that KVM is advancing PC while an exception is\npending, i.e. that KVM is retiring the MMIO instruction despite a\npending synchronous external abort. Womp womp.\n\nFix the glaring UAPI bug by skipping over all the MMIO emulation in\ncase there is a pending synchronous exception. Note that while userspace\nis capable of pending an asynchronous exception (SError, IRQ, or FIQ),\nit is still safe to retire the MMIO instruction in this case as (1) they\nare by definition asynchronous, and (2) KVM relies on hardware support\nfor pending/delivering these exceptions instead of the software state\nmachine for advancing PC."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: arm64: No retire la instrucción MMIO abortada Devolver una interrupción al invitado para un acceso MMIO no compatible es una característica documentada de KVM UAPI. Sin embargo, está claro que esta instalación ha sido sometida a pruebas limitadas, ya que el espacio de usuario puede causar trivialmente una ADVERTENCIA en el retorno de MMIO: ADVERTENCIA: CPU: 0 PID: 30558 en arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 Rastreo de llamadas: kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133 kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487 __do_sys_ioctl fs/ioctl.c:51 [en línea] __se_sys_ioctl fs/ioctl.c:893 [en línea] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [en línea] anybody_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 nobody_svc_common+0x1e0/0x23c hate_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 El splat se queja de que KVM está avanzando la PC mientras hay una excepción pendiente, es decir, que KVM está retirando la instrucción MMIO a pesar de una interrupción externa sincrónica pendiente. Womp womp. Corrija el evidente error de UAPI omitiendo toda la emulación MMIO en caso de que haya una excepción sincrónica pendiente. Tenga en cuenta que si bien el espacio de usuario puede dejar pendiente una excepción asincrónica (SError, IRQ o FIQ), aún es seguro retirar la instrucción MMIO en este caso ya que (1) son asincrónicas por definición y (2) KVM depende del soporte de hardware para dejar pendiente/entregar estas excepciones en lugar de la máquina de estado del software para el avance de la PC."
}
],
"lastModified": "2026-06-17T08:08:33.840",
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