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CVE-2025-37849

Estado: ModificadaAlta (7.8)—

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

KVM: arm64: Tear down vGIC on failed vCPU creation

If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor, we propagate the error back to the ioctl but leave the vGIC vCPU data initialised. Note only does this leak the corresponding memory when the vCPU is destroyed but it can also lead to use-after-free if the redistributor device handling tries to walk into the vCPU.

Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the vGIC vCPU structures are destroyed on error.

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.

CVE-2025-37849 es una vulnerabilidad local (AV:L, PR:L) sin interacción del usuario que permite escalada de privilegios mediante use-after-free en vGIC del kernel de Linux. El impacto de ejecución de código es posible explotando la condición de liberación de memoria; el DoS es secundario por crash d

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationFilter Network Traffic

Tecnologías afectadas (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Tear down vGIC on failed vCPU creation\n\nIf kvm_arch_vcpu_create() fails to share the vCPU page with the\nhypervisor, we propagate the error back to the ioctl but leave the\nvGIC vCPU data initialised. Note only does this leak the corresponding\nmemory when the vCPU is destroyed but it can also lead to use-after-free\nif the redistributor device handling tries to walk into the vCPU.\n\nAdd the missing cleanup to kvm_arch_vcpu_create(), ensuring that the\nvGIC vCPU structures are destroyed on error."
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