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CVE-2026-72040

UnknownEPSS 0.20%

Last modified

CVE-2026-72040 is a vulnerability of currently unknown severity. 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). EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.20%

10.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= f63723ca7d7623f9dae1990973cd158671f03c56, < 122ca6b2af714e114c9b872a48372ace31a9ab1f; >= 348121b29594d42d1635648fd3ed31dfa25351d5, < 9409e18ffe7378d202efe1cf69989df9f67b0369; >= 53d6e403affbf6df2c859a0ea00ccfc1e72090ca, < e2a3b77df6aef031455dd83ea8ed4344b7dca1f9; >= b52da4054ee0bf9ecb44996f2c83236ff50b3812, < f5c5065963024390ddad51bd455d1adc710de575; >= b52da4054ee0bf9ecb44996f2c83236ff50b3812, < 0fd23994ec8c5436d9f0b50848deb87ed933e6b3; >= b52da4054ee0bf9ecb44996f2c83236ff50b3812, < a3f3859cecacb64f18fd446271ece9a3b3f2d4de; 0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5; >= 6.1.157, < 6.1.184; >= 6.6.113, < 6.6.148; >= 6.12.54, < 6.12.101; >= 6.17.4, < 6.18
LinuxLinux6.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72040?
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.
How severe is CVE-2026-72040?
Severity scoring for CVE-2026-72040 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72040?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST