CVE-2026-74355
iommu/vt-d: Fix RB-tree corruption in probe error path
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().
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Initialize RB-tree nodes as empty using RB_CLEAR_NODE().
- Guard RB-tree removals with RB_EMPTY_NODE().
- Apply the kernel patch for iommu/vt-d.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74355.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74355 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74355
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74355 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74355 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'f5102e0fc3c6dc8685549891a96e4589fdb3e211', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'd16923a45d4d08367650fdc3451c89299ab6ac5a', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': '43bd9e6d5513cb1edbafdeef146a1edc3aaced56', 'versionType': 'git'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'f5102e0fc3c6dc8685549891a96e4589fdb3e211', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'd16923a45d4d08367650fdc3451c89299ab6ac5a', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': '43bd9e6d5513cb1edbafdeef146a1edc3aaced56', 'versionType': 'git'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'f5102e0fc3c6dc8685549891a96e4589fdb3e211', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': 'd16923a45d4d08367650fdc3451c89299ab6ac5a', 'versionType': 'git'}, {'status': 'affected', 'version': '4f1492efb495bcef34c9ee8a94af81e6cea5abf4', 'lessThan': '43bd9e6d5513cb1edbafdeef146a1edc3aaced56', 'versionType': 'git'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/iommu/intel/iommu.c'], 'defaultStatus': 'affected'}] Added 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(). Added Reference https://git.kernel.org/stable/c/43bd9e6d5513cb1edbafdeef146a1edc3aaced56 Added Reference https://git.kernel.org/stable/c/d16923a45d4d08367650fdc3451c89299ab6ac5a Added Reference https://git.kernel.org/stable/c/f5102e0fc3c6dc8685549891a96e4589fdb3e211