ipmi: fix refcount leak in i_ipmi_request()
Summary
| CVE | CVE-2026-72040 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:21:13 UTC |
| Updated | 2026-08-17 06:18:01 UTC |
| 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. |
Risk And Classification
EPSS: 0.002000000 probability, percentile 0.101750000 (date 2026-08-16)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 348121b29594d42d1635648fd3ed31dfa25351d5 9409e18ffe7378d202efe1cf69989df9f67b0369 git | Not specified |
| CNA | Linux | Linux | affected 53d6e403affbf6df2c859a0ea00ccfc1e72090ca e2a3b77df6aef031455dd83ea8ed4344b7dca1f9 git | Not specified |
| CNA | Linux | Linux | affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 f5c5065963024390ddad51bd455d1adc710de575 git | Not specified |
| CNA | Linux | Linux | affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 0fd23994ec8c5436d9f0b50848deb87ed933e6b3 git | Not specified |
| CNA | Linux | Linux | affected b52da4054ee0bf9ecb44996f2c83236ff50b3812 a3f3859cecacb64f18fd446271ece9a3b3f2d4de git | Not specified |
| CNA | Linux | Linux | affected f63723ca7d7623f9dae1990973cd158671f03c56 git | Not specified |
| CNA | Linux | Linux | affected 0ed73be9a2547ffb9b5c1d879ad9bfab73d920b5 git | Not specified |
| CNA | Linux | Linux | affected 6.6.113 6.6.148 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.54 6.12.101 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.157 6.2 semver | Not specified |
| CNA | Linux | Linux | affected 6.17.4 6.18 semver | Not specified |
| CNA | Linux | Linux | affected 6.18 | Not specified |
| CNA | Linux | Linux | unaffected 6.18 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.