CVE-2025-37819
Estado: AnalizadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()
With ACPI in place, gicv2m_get_fwnode() is registered with the pci subsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime during a PCI host bridge probe. But, the call back is wrongly marked as __init, causing it to be freed, while being registered with the PCI subsystem and could trigger:
This is easily reproducible on a Juno board with ACPI boot.
Retain the function for later use.
Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel paging request at virtual address ffff8000816c0400 gicv2m_get_fwnode+0x0/0x58 (P) pci_set_bus_msi_domain+0x74/0x88 pci_register_host_bridge+0x194/0x548
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1059Command and Scripting Interpreterexecution75 %
Vulnerabilidad de uso después de liberación (CWE-416) en kernel Linux con acceso local (AV:L) y privilegios de usuario (PR:L). Permite ejecución de código no autorizado elevando permisos o causando DoS.
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
Tecnologías afectadas (2)
CWE
- CWE-416
Referencias
- https://git.kernel.org/stable/c/0c241dedc43a036599757cd08f356253fa3e5014
- https://git.kernel.org/stable/c/2f2803e4b5e4df2b08d378deaab78b1681ef9b30
- https://git.kernel.org/stable/c/3318dc299b072a0511d6dfd8367f3304fb6d9827
- https://git.kernel.org/stable/c/3939d6f29d34cdb60e3f68b76e39e00a964a1d51
- https://git.kernel.org/stable/c/47bee0081b483b077c7560bc5358ad101f89c8ef
- https://git.kernel.org/stable/c/b63de43af8d215b0499eac28b2caa4439183efc1
- https://git.kernel.org/stable/c/dc0d654eb4179b06d3206e4396d072108b9ba082
- https://git.kernel.org/stable/c/f95659affee301464f0d058d528d96b35b452da8
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()\n\nWith ACPI in place, gicv2m_get_fwnode() is registered with the pci\nsubsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime\nduring a PCI host bridge probe. But, the call back is wrongly marked as\n__init, causing it to be freed, while being registered with the PCI\nsubsystem and could trigger:\n\n Unable to handle kernel paging request at virtual address ffff8000816c0400\n gicv2m_get_fwnode+0x0/0x58 (P)\n pci_set_bus_msi_domain+0x74/0x88\n pci_register_host_bridge+0x194/0x548\n\nThis is easily reproducible on a Juno board with ACPI boot.\n\nRetain the function for later use."
},
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: irqchip/gic-v2m: Impedir el uso tras la liberación de gicv2m_get_fwnode() Con ACPI en su lugar, gicv2m_get_fwnode() se registra en el subsistema pci como pci_msi_get_fwnode_cb(), que puede invocarse en tiempo de ejecución durante un sondeo de puente de host PCI. Pero, la devolución de llamada se marca erróneamente como __init, lo que provoca que se libere, mientras se registra en el subsistema PCI y podría desencadenar: No se puede manejar la solicitud de paginación del kernel en la dirección virtual ffff8000816c0400 gicv2m_get_fwnode+0x0/0x58 (P) pci_set_bus_msi_domain+0x74/0x88 pci_register_host_bridge+0x194/0x548 Esto es fácilmente reproducible en una placa Juno con arranque ACPI. Conserve la función para uso posterior."
}
],
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