CVE-2024-53232
Status: ModifiedMedium (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
iommu/s390: Implement blocking domain
This fixes a crash when surprise hot-unplugging a PCI device. This crash happens because during hot-unplug __iommu_group_set_domain_nofail() attaching the default domain fails when the platform no longer recognizes the device as it has already been removed and we end up with a NULL domain pointer and UAF.
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This is exactly the case referred to in the second comment in __iommu_device_set_domain() and just as stated there if we can instead attach the blocking domain the UAF is prevented as this can handle the already removed device. Implement the blocking domain to use this handling. With this change, the crash is fixed but we still hit a warning attempting to change DMA ownership on a blocked device.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Base score: 5.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.23%
- Percentile among all scored CVEs: 13
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
CWEs
- CWE-416, CWE-476
- CWE-416
References
Raw JSON (NVD)
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Implement blocking domain\n\nThis fixes a crash when surprise hot-unplugging a PCI device. This crash\nhappens because during hot-unplug __iommu_group_set_domain_nofail()\nattaching the default domain fails when the platform no longer\nrecognizes the device as it has already been removed and we end up with\na NULL domain pointer and UAF. This is exactly the case referred to in\nthe second comment in __iommu_device_set_domain() and just as stated\nthere if we can instead attach the blocking domain the UAF is prevented\nas this can handle the already removed device. Implement the blocking\ndomain to use this handling. With this change, the crash is fixed but\nwe still hit a warning attempting to change DMA ownership on a blocked\ndevice."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/s390: Implementar dominio de bloqueo Esto corrige un fallo al desconectar en caliente por sorpresa un dispositivo PCI. Este fallo ocurre porque durante la desconexión en caliente __iommu_group_set_domain_nofail() la conexión del dominio predeterminado falla cuando la plataforma ya no reconoce el dispositivo porque ya se ha eliminado y terminamos con un puntero de dominio NULL y UAF. Este es exactamente el caso al que se hace referencia en el segundo comentario en __iommu_device_set_domain() y tal como se indica allí, si en su lugar podemos conectar el dominio de bloqueo, se evita el UAF ya que puede gestionar el dispositivo ya eliminado. Implemente el dominio de bloqueo para usar esta gestión. Con este cambio, el fallo se corrige, pero aún encontramos una advertencia al intentar cambiar la propiedad de DMA en un dispositivo bloqueado."
}
],
"lastModified": "2026-06-17T08:08:39.560",
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