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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2024-40945
HistoryJul 12, 2024 - 1:15 p.m.

CVE-2024-40945

2024-07-1213:15:16
Debian Security Bug Tracker
security-tracker.debian.org
4
linux
kernel
vulnerability
iommu
iommu_sva_bind_device
drivers
null pointer
dereference

AI Score

6.9

Confidence

High

EPSS

0

Percentile

10.6%

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.

AI Score

6.9

Confidence

High

EPSS

0

Percentile

10.6%