In the Linux kernel, the following vulnerability has been resolved:
iommu/msm: Unwind probe state on registration failure
msm_iommu_probe() adds its devm-managed IOMMU object to
qcom_iommu_devices before adding the IOMMU sysfs device and registering
it with the IOMMU core. If iommu_device_sysfs_add() fails, probe returns with the object still on
qcom_iommu_devices. The driver core then releases the devm allocation,
leaving a dangling list entry that later list walks may dereference.
If iommu_device_register() fails, the same dangling list entry remains
and the sysfs device is left registered as well. Unwind the sysfs device and global list entry in reverse setup order on
the corresponding failure paths.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 4
https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02
416baaa9-dc9f-4396-8d5f-8c081fb06d67