CVE-2026-72040
ipmi: fix refcount leak in i_ipmi_request()
Description
In the Linux kernel, the following vulnerability has been resolved: ipmi: fix refcount leak in i_ipmi_request() When a caller provides a `supplied_recv` message to i_ipmi_request(), the function increments the user's `nr_msgs` reference count. If an error occurs later, the out_err cleanup path only frees the recv_msg if the function allocated it itself (i.e., !supplied_recv). In the supplied_recv case the cleanup is skipped, leaving the reference count elevated. The caller ipmi_request_supply_msgs() does not release the supplied_recv on error, so the reference is permanently leaked. Fix this by explicitly reverting the reference count operations when a supplied recv_msg with a valid user pointer is present in the error path: decrement nr_msgs and drop the user's kref.
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Revert reference count operations on error.
- Decrement nr_msgs and drop user's kref.
- Apply the provided kernel patch.
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-2026-72040.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72040 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-2026-72040
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-2026-72040 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72040 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': '348121b29594d42d1635648fd3ed31dfa25351d5', 'lessThan': '9409e18ffe7378d202efe1cf69989df9f67b0369', 'versionType': 'git'}, {'status': 'affected', 'version': '53d6e403affbf6df2c859a0ea00ccfc1e72090ca', 'lessThan': 'e2a3b77df6aef031455dd83ea8ed4344b7dca1f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'f5c5065963024390ddad51bd455d1adc710de575', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': '0fd23994ec8c5436d9f0b50848deb87ed933e6b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'a3f3859cecacb64f18fd446271ece9a3b3f2d4de', 'versionType': 'git'}, {'status': 'affected', 'version': 'f63723ca7d7623f9dae1990973cd158671f03c56', 'versionType': 'git'}, {'status': 'affected', 'version': '0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.113', 'lessThan': '6.6.148', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.54', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.157', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.17.4', 'lessThan': '6.18', 'versionType': 'semver'}], 'programFiles': ['drivers/char/ipmi/ipmi_msghandler.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'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/char/ipmi/ipmi_msghandler.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '348121b29594d42d1635648fd3ed31dfa25351d5', 'lessThan': '9409e18ffe7378d202efe1cf69989df9f67b0369', 'versionType': 'git'}, {'status': 'affected', 'version': '53d6e403affbf6df2c859a0ea00ccfc1e72090ca', 'lessThan': 'e2a3b77df6aef031455dd83ea8ed4344b7dca1f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'f5c5065963024390ddad51bd455d1adc710de575', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': '0fd23994ec8c5436d9f0b50848deb87ed933e6b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'a3f3859cecacb64f18fd446271ece9a3b3f2d4de', 'versionType': 'git'}, {'status': 'affected', 'version': 'f63723ca7d7623f9dae1990973cd158671f03c56', 'versionType': 'git'}, {'status': 'affected', 'version': '0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.113', 'lessThan': '6.6.148', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.54', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.157', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.17.4', 'lessThan': '6.18', 'versionType': 'semver'}], 'programFiles': ['drivers/char/ipmi/ipmi_msghandler.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'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/char/ipmi/ipmi_msghandler.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': '348121b29594d42d1635648fd3ed31dfa25351d5', 'lessThan': '9409e18ffe7378d202efe1cf69989df9f67b0369', 'versionType': 'git'}, {'status': 'affected', 'version': '53d6e403affbf6df2c859a0ea00ccfc1e72090ca', 'lessThan': 'e2a3b77df6aef031455dd83ea8ed4344b7dca1f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'f5c5065963024390ddad51bd455d1adc710de575', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': '0fd23994ec8c5436d9f0b50848deb87ed933e6b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b52da4054ee0bf9ecb44996f2c83236ff50b3812', 'lessThan': 'a3f3859cecacb64f18fd446271ece9a3b3f2d4de', 'versionType': 'git'}, {'status': 'affected', 'version': 'f63723ca7d7623f9dae1990973cd158671f03c56', 'versionType': 'git'}, {'status': 'affected', 'version': '0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.113', 'lessThan': '6.6.148', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.54', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.157', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.17.4', 'lessThan': '6.18', 'versionType': 'semver'}], 'programFiles': ['drivers/char/ipmi/ipmi_msghandler.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'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/char/ipmi/ipmi_msghandler.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ipmi: fix refcount leak in i_ipmi_request() When a caller provides a `supplied_recv` message to i_ipmi_request(), the function increments the user's `nr_msgs` reference count. If an error occurs later, the out_err cleanup path only frees the recv_msg if the function allocated it itself (i.e., !supplied_recv). In the supplied_recv case the cleanup is skipped, leaving the reference count elevated. The caller ipmi_request_supply_msgs() does not release the supplied_recv on error, so the reference is permanently leaked. Fix this by explicitly reverting the reference count operations when a supplied recv_msg with a valid user pointer is present in the error path: decrement nr_msgs and drop the user's kref. Added Reference https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3 Added Reference https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369 Added Reference https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de Added Reference https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9 Added Reference https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575