CVE-2026-74273
cxl/region: Block region delete during region creation
Description
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Block region delete during region creation Expand the range lock, rename it "regions_lock", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held.
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
- Expand the range lock to include critical periods.
- Rename the lock to 'regions_lock'.
- Block region deletion during specified critical periods.
- Ensure proper locking during device hotplug flows.
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-2026-74273.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8 | |
| https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74273 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-2026-74273
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-2026-74273 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74273 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': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'd91feb88692e81b00cd22f0125cfcd04970b4a0b', 'versionType': 'git'}], 'programFiles': ['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': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', '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/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': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'd91feb88692e81b00cd22f0125cfcd04970b4a0b', 'versionType': 'git'}], 'programFiles': ['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': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', '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/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': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32320b71f085f8d82afedcf285f1682c8c00aed', 'lessThan': 'd91feb88692e81b00cd22f0125cfcd04970b4a0b', 'versionType': 'git'}], 'programFiles': ['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': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', '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/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: Block region delete during region creation Expand the range lock, rename it "regions_lock", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held. Added Reference https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8 Added Reference https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b