bus: mhi: ep: Fix device refcount leak in the error path of MHI device creation

Summary

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: ep: Fix device refcount leak in the error path of MHI device creation mhi_ep_create_device() takes one device reference for the UL channel and another for the DL channel after allocating the transfer device. These references are normally released by mhi_ep_destroy_device() before the device itself is removed. If dev_set_name() or device_add() fails, the error path currently drops only one reference. The remaining channel references keep the device from being released and leave the channels associated with a device that was never registered. Route both failures through a common unwind path that drops the DL channel reference, the UL channel reference, and the initial reference from device_initialize().

Timeline

1. Sep 17, 2026, 4:11 PM UTCCVE published
2. Oct 19, 2026, 9:06 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 8acc3813ab5015af73eeb74c9032443162f122d1; From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 51ddb831a36102fd0ea25f354935e49abce9f0a1; From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 4fae8fd4adc7f4765463ddeb1a5fad23936432f6; From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 5587e7871ce994bb079f97fe7e430d99627e5292; From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 8f3f64faee335eb678fd7dca7b95dfe3d0b271fd; From 297c77a0f27312b9a04696018c4cbd47926ca92b · fixed in 6f12862600bb70e599a614d706a095ea5f8f9858

• Linux Linux

  5.19

• KernelLinux

  From 5.19.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 6