Vulnerability 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.
References
- https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3
- https://git.kernel.org/stable/c/122ca6b2af714e114c9b872a48372ace31a9ab1f
- https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369
- https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de
- https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9
- https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575
FAQ
What is CVE-2026-72040?
CVE-2026-72040 is a documented vulnerability. 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 inc...
How severe is CVE-2026-72040?
CVSS scoring is not yet available for CVE-2026-72040. Check NVD for updates.
Is there a patch for CVE-2026-72040?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.