CVE-2026-72040
ipmi: fix refcount leak in i_ipmi_request()
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ f63723ca7d7623f9dae1990973cd158671f03c56; < 122ca6b2af714e114c9b872a48372ace31a9ab1f (affected, git) ≥ 348121b29594d42d1635648fd3ed31dfa25351d5; < 9409e18ffe7378d202efe1cf69989df9f67b0369 (affected, git) ≥ 53d6e403affbf6df2c859a0ea00ccfc1e72090ca; < e2a3b77df6aef031455dd83ea8ed4344b7dca1f9 (affected, git) ≥ b52da4054ee0bf9ecb44996f2c83236ff50b3812; < f5c5065963024390ddad51bd455d1adc710de575 (affected, git) ≥ b52da4054ee0bf9ecb44996f2c83236ff50b3812; < 0fd23994ec8c5436d9f0b50848deb87ed933e6b3 (affected, git) ≥ b52da4054ee0bf9ecb44996f2c83236ff50b3812; < a3f3859cecacb64f18fd446271ece9a3b3f2d4de (affected, git) 0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5 (affected, git) ≥ 6.1.157; < 6.1.184 (affected, semver) ≥ 6.6.113; < 6.6.148 (affected, semver) ≥ 6.12.54; < 6.12.101 (affected, semver) ≥ 6.17.4; < 6.18 (affected, semver) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
6.18 (affected) ≥ 0; < 6.18 (unaffected, semver) ≥ 6.1.184; ≤ 6.1.* (unaffected, semver) ≥ 6.6.148; ≤ 6.6.* (unaffected, semver) ≥ 6.12.101; ≤ 6.12.* (unaffected, semver) ≥ 6.18.40; ≤ 6.18.* (unaffected, semver) ≥ 7.1.5; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/122ca6b2af714e114c9b872a48372ace31a9ab1fCNA: Linux
- https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369CNA: Linux
- https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9CNA: Linux
- https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575CNA: Linux
- https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3CNA: Linux
- https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4deCNA: Linux
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