| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52520: platform/x86: think-lmi: Fix reference leak |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| platform/x86: think-lmi: Fix reference leak |
| |
| If a duplicate attribute is found using kset_find_obj(), a reference |
| to that attribute is returned which needs to be disposed accordingly |
| using kobject_put(). Move the setting name validation into a separate |
| function to allow for this change without having to duplicate the |
| cleanup code for this setting. |
| As a side note, a very similar bug was fixed in |
| commit 7295a996fdab ("platform/x86: dell-sysman: Fix reference leak"), |
| so it seems that the bug was copied from that driver. |
| |
| Compile-tested only. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52520 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 1bcad8e510b27ad843315ab2c27ccf459e3acded and fixed in 5.15.136 with commit 124cf0ea4b82e1444ec8c7420af4e7db5558c293 |
| Issue introduced in 5.14 with commit 1bcad8e510b27ad843315ab2c27ccf459e3acded and fixed in 6.1.59 with commit af21c9119a37cecb7ff27ce0c2f3cf721e9d0ec4 |
| Issue introduced in 5.14 with commit 1bcad8e510b27ad843315ab2c27ccf459e3acded and fixed in 6.5.8 with commit c6e3023579de8d33256771ac0745239029e81106 |
| Issue introduced in 5.14 with commit 1bcad8e510b27ad843315ab2c27ccf459e3acded and fixed in 6.6 with commit 528ab3e605cabf2f9c9bd5944d3bfe15f6e94f81 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52520 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/platform/x86/think-lmi.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/124cf0ea4b82e1444ec8c7420af4e7db5558c293 |
| https://git.kernel.org/stable/c/af21c9119a37cecb7ff27ce0c2f3cf721e9d0ec4 |
| https://git.kernel.org/stable/c/c6e3023579de8d33256771ac0745239029e81106 |
| https://git.kernel.org/stable/c/528ab3e605cabf2f9c9bd5944d3bfe15f6e94f81 |
