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

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Summary

CVECVE-2026-74355
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:36 UTC
Updated2026-08-15 06:22:36 UTC
DescriptionIn 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().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 f5102e0fc3c6dc8685549891a96e4589fdb3e211 git Not specified
CNA Linux Linux affected 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 d16923a45d4d08367650fdc3451c89299ab6ac5a git Not specified
CNA Linux Linux affected 4f1492efb495bcef34c9ee8a94af81e6cea5abf4 43bd9e6d5513cb1edbafdeef146a1edc3aaced56 git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f5102e0fc3c6dc8685549891a96e4589fdb3e211 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d16923a45d4d08367650fdc3451c89299ab6ac5a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/43bd9e6d5513cb1edbafdeef146a1edc3aaced56 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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