CVE-2026-72040

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux348121b29594d42d1635648fd3ed31dfa25351d5 < 9409e18ffe7378d202efe1cf69989df9f67b0369affected
LinuxLinux53d6e403affbf6df2c859a0ea00ccfc1e72090ca < e2a3b77df6aef031455dd83ea8ed4344b7dca1f9affected
LinuxLinuxb52da4054ee0bf9ecb44996f2c83236ff50b3812 < f5c5065963024390ddad51bd455d1adc710de575affected
LinuxLinuxb52da4054ee0bf9ecb44996f2c83236ff50b3812 < 0fd23994ec8c5436d9f0b50848deb87ed933e6b3affected
LinuxLinuxb52da4054ee0bf9ecb44996f2c83236ff50b3812 < a3f3859cecacb64f18fd446271ece9a3b3f2d4deaffected
LinuxLinuxf63723ca7d7623f9dae1990973cd158671f03c56affected
LinuxLinux0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5affected
LinuxLinux6.6.113 < 6.6.148affected
LinuxLinux6.12.54 < 6.12.101affected
LinuxLinux6.1.157 < 6.2affected
LinuxLinux6.17.4 < 6.18affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References