CVE-2024-36953
Estado: AnalizadaMedia (5.5)—
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: KVM: arm64: vgic-v2: Verifique vCPU que no sea NULL en vgic_v2_parse_attr() vgic_v2_parse_attr() es responsable de encontrar la vCPU que coincida con el CPUID proporcionado por el usuario, que (de curso) puede no ser válido. Si el ID no es válido, kvm_get_vcpu_by_id() devuelve NULL, que no se maneja correctamente. De manera similar al flujo de uaccess de GICv3, verifique que kvm_get_vcpu_by_id() realmente devuelva algo y falle el ioctl si no.
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: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-476
Referencias
- https://git.kernel.org/stable/c/01981276d64e542c177b243f7c979fee855d5487
- https://git.kernel.org/stable/c/17db92da8be5dd3bf63c01f4109fe47db64fc66f
- https://git.kernel.org/stable/c/3a5b0378ac6776c7c31b18e0f3c1389bd6005e80
- https://git.kernel.org/stable/c/4404465a1bee3607ad90a4c5f9e16dfd75b85728
- https://git.kernel.org/stable/c/6ddb4f372fc63210034b903d96ebbeb3c7195adb
- https://git.kernel.org/stable/c/8d6a1c8e3de36cb0f5e866f1a582b00939e23104
- https://git.kernel.org/stable/c/01981276d64e542c177b243f7c979fee855d5487
- https://git.kernel.org/stable/c/17db92da8be5dd3bf63c01f4109fe47db64fc66f
- https://git.kernel.org/stable/c/3a5b0378ac6776c7c31b18e0f3c1389bd6005e80
- https://git.kernel.org/stable/c/4404465a1bee3607ad90a4c5f9e16dfd75b85728
- https://git.kernel.org/stable/c/6ddb4f372fc63210034b903d96ebbeb3c7195adb
- https://git.kernel.org/stable/c/8d6a1c8e3de36cb0f5e866f1a582b00939e23104
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-v2: Check for non-NULL vCPU in vgic_v2_parse_attr()\n\nvgic_v2_parse_attr() is responsible for finding the vCPU that matches\nthe user-provided CPUID, which (of course) may not be valid. If the ID\nis invalid, kvm_get_vcpu_by_id() returns NULL, which isn't handled\ngracefully.\n\nSimilar to the GICv3 uaccess flow, check that kvm_get_vcpu_by_id()\nactually returns something and fail the ioctl if not."
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