Vulnerability Details CVE-2022-48894
In the Linux kernel, the following vulnerability has been resolved:
iommu/arm-smmu-v3: Don't unregister on shutdown
Similar to SMMUv2, this driver calls iommu_device_unregister() from the
shutdown path, which removes the IOMMU groups with no coordination
whatsoever with their users - shutdown methods are optional in device
drivers. This can lead to NULL pointer dereferences in those drivers'
DMA API calls, or worse.
Instead of calling the full arm_smmu_device_remove() from
arm_smmu_device_shutdown(), let's pick only the relevant function call -
arm_smmu_device_disable() - more or less the reverse of
arm_smmu_device_reset() - and call just that from the shutdown path.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 8.5%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2022-48894
-
cpe:2.3:o:linux:linux_kernel:6.1
-
cpe:2.3:o:linux:linux_kernel:6.1.1
-
cpe:2.3:o:linux:linux_kernel:6.1.2
-
cpe:2.3:o:linux:linux_kernel:6.1.3
-
cpe:2.3:o:linux:linux_kernel:6.1.4
-
cpe:2.3:o:linux:linux_kernel:6.1.5
-
cpe:2.3:o:linux:linux_kernel:6.1.6
-
cpe:2.3:o:linux:linux_kernel:6.2