CVE-2026-74272
cxl/region: Resolve region deletion races
Description
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Resolve region deletion races Sungwoo noticed that the sysfs trigger to delete a region may try to delete a region multiple times. It also has no exclusion relative to the kernel releasing the region via CXL root device teardown. Instead of installing new cxl root devres actions per region, use the existing root decoder unregistration event to remove all remaining regions. An xarray of regions replaces a devres list of regions. This handles 3 separate issues with the old approach: 1/ sysfs users racing to delete the same region: no longer possible now that the regions_lock is held over the lookup and deletion. 2/ multiple actions triggering deletion of the same region: solved by erasing regions while holding @regions_lock, and only proceeding on successful erasure. 3/ userspace racing devres_release_all() to trigger the devres not found warning: solved by sysfs unregistration not requiring a release action
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
Solution
- Update the Linux kernel to the latest stable version.
- Ensure the patch for cxl/region race condition is applied.
- Verify region deletion exclusion mechanisms are correctly implemented.
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-2026-74272.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91 | |
| https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74272 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-2026-74272
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-2026-74272 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74272 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 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': 'be44c1c04f85d7b7ac1c597a30b443bbd346acbd', 'versionType': 'git'}, {'status': 'affected', 'version': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': '4dd86ca99ffcc413cbf79063fd9956ef54e0ca91', 'versionType': 'git'}], 'programFiles': ['drivers/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', 'versionType': 'semver'}, {'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/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': 'be44c1c04f85d7b7ac1c597a30b443bbd346acbd', 'versionType': 'git'}, {'status': 'affected', 'version': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': '4dd86ca99ffcc413cbf79063fd9956ef54e0ca91', 'versionType': 'git'}], 'programFiles': ['drivers/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], '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': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': 'be44c1c04f85d7b7ac1c597a30b443bbd346acbd', 'versionType': 'git'}, {'status': 'affected', 'version': '779dd20cfb56c510f89877cca45529fa9f8bc450', 'lessThan': '4dd86ca99ffcc413cbf79063fd9956ef54e0ca91', 'versionType': 'git'}], 'programFiles': ['drivers/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', 'versionType': 'semver'}, {'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/cxl/core/core.h', 'drivers/cxl/core/port.c', 'drivers/cxl/core/region.c', 'drivers/cxl/cxl.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: cxl/region: Resolve region deletion races Sungwoo noticed that the sysfs trigger to delete a region may try to delete a region multiple times. It also has no exclusion relative to the kernel releasing the region via CXL root device teardown. Instead of installing new cxl root devres actions per region, use the existing root decoder unregistration event to remove all remaining regions. An xarray of regions replaces a devres list of regions. This handles 3 separate issues with the old approach: 1/ sysfs users racing to delete the same region: no longer possible now that the regions_lock is held over the lookup and deletion. 2/ multiple actions triggering deletion of the same region: solved by erasing regions while holding @regions_lock, and only proceeding on successful erasure. 3/ userspace racing devres_release_all() to trigger the devres not found warning: solved by sysfs unregistration not requiring a release action Added Reference https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91 Added Reference https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd