Riskcovery

CVE-2026-74355

iommu/vt-d: Fix RB-tree corruption in probe error path

State
Published
Severity
8.2 High
Published
Aug 15, 2026
Updated
Oct 16, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

Description

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().

Scores

CVSSScoreVectorSource
3.18.2 HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 to before f5102e0fc3c6dc8685549891a96e4589fdb3e211Affected
  • 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 to before d16923a45d4d08367650fdc3451c89299ab6ac5aAffected
  • 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 to before 43bd9e6d5513cb1edbafdeef146a1edc3aaced56Affected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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