CVE-2024-40945

In the Linux kernel, the following vulnerability has been resolved: iommu: Return right value in iommu_sva_bind_device() iommu_sva_bind_device() should return either a sva bond handle or an ERR_PTR value in error cases. Existing drivers (idxd and uacce) only check the return value with IS_ERR(). This could potentially lead to a kernel NULL pointer dereference issue if the function returns NULL instead of an error pointer. In reality, this doesn't cause any problems because iommu_sva_bind_device() only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA. In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will return an error, and the device drivers won't call iommu_sva_bind_device() at all.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/2973b8e7d127754de9013177c41c0b5547406998
https://git.kernel.org/stable/c/61a96da9649a6b6a1a5d5bde9374b045fdb5c12e
https://git.kernel.org/stable/c/700f564758882db7c039dfba9443fe762561a3f8
https://git.kernel.org/stable/c/7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6
https://git.kernel.org/stable/c/89e8a2366e3bce584b6c01549d5019c5cda1205e
https://git.kernel.org/stable/c/cf34f8f66982a36e5cba0d05781b21ec9606b91e

Configurations

No configuration.

History

No history.

Information

Published : 2024-07-12 13:15

Updated : 2024-07-12 16:34

NVD link : CVE-2024-40945

Mitre link : CVE-2024-40945

CVE.ORG link : CVE-2024-40945

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2024-40945", "cveTags": [], "metrics": {}, "published": "2024-07-12T13:15:16.853", "references": [{"url": "https://git.kernel.org/stable/c/2973b8e7d127754de9013177c41c0b5547406998", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/61a96da9649a6b6a1a5d5bde9374b045fdb5c12e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/700f564758882db7c039dfba9443fe762561a3f8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/89e8a2366e3bce584b6c01549d5019c5cda1205e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cf34f8f66982a36e5cba0d05781b21ec9606b91e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu: Return right value in iommu_sva_bind_device()\n\niommu_sva_bind_device() should return either a sva bond handle or an\nERR_PTR value in error cases. Existing drivers (idxd and uacce) only\ncheck the return value with IS_ERR(). This could potentially lead to\na kernel NULL pointer dereference issue if the function returns NULL\ninstead of an error pointer.\n\nIn reality, this doesn't cause any problems because iommu_sva_bind_device()\nonly returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA.\nIn this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will\nreturn an error, and the device drivers won't call iommu_sva_bind_device()\nat all."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: iommu: Devuelve el valor correcto en iommu_sva_bind_device() iommu_sva_bind_device() deber\u00eda devolver un identificador de enlace sva o un valor ERR_PTR en casos de error. Los controladores existentes (idxd y uacce) solo verifican el valor de retorno con IS_ERR(). Esto podr\u00eda provocar un problema de desreferencia del puntero NULL del kernel si la funci\u00f3n devuelve NULL en lugar de un puntero de error. En realidad, esto no causa ning\u00fan problema porque iommu_sva_bind_device() solo devuelve NULL cuando el kernel no est\u00e1 configurado con CONFIG_IOMMU_SVA. En este caso, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) devolver\u00e1 un error y los controladores del dispositivo no llamar\u00e1n a iommu_sva_bind_device() en absoluto."}], "lastModified": "2024-07-12T16:34:58.687", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}