0.0
NA
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
Affected Products

The following products are affected by CVE-2026-72040 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
Solution
Revert reference count operations on error for supplied messages.
  • Revert reference count operations on error.
  • Decrement nr_msgs and drop user's kref.
  • Apply the provided kernel patch.
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
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.