CVE-2026-74355
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
iommu/vt-d: Fix RB-tree corruption in probe error path
The info->node RB-tree member is zero-initialized via kzalloc. If
a device does not support ATS, the device_rbtree_insert() call is
skipped. If a subsequent probe step fails, the error path jumps to
device_rbtree_remove(), which misinterprets the zeroed node as
a tree root and corrupts the device RB-tree.
Fix this by explicitly initializing the RB-node as empty using
RB_CLEAR_NODE() during initialization and guarding the removal with
RB_EMPTY_NODE().
https://git.kernel.org/stable/c/43bd9e6d5513cb1edbafdeef146a1edc3aaced56
https://git.kernel.org/stable/c/d16923a45d4d08367650fdc3451c89299ab6ac5a
https://git.kernel.org/stable/c/f5102e0fc3c6dc8685549891a96e4589fdb3e211