| 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-2023-52704: freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL |
| |
| Tetsuo-San noted that commit f5d39b020809 ("freezer,sched: Rewrite |
| core freezer logic") broke call_usermodehelper_exec() for the KILLABLE |
| case. |
| |
| Specifically it was missed that the second, unconditional, |
| wait_for_completion() was not optional and ensures the on-stack |
| completion is unused before going out-of-scope. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52704 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit f5d39b020809146cc28e6e73369bf8065e0310aa and fixed in 6.1.13 with commit 7f9f6c54da876b3f0bece2b569456ceb96965ed7 |
| Issue introduced in 6.1 with commit f5d39b020809146cc28e6e73369bf8065e0310aa and fixed in 6.2 with commit eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d |
| |
| 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-2023-52704 |
| 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: |
| kernel/umh.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/7f9f6c54da876b3f0bece2b569456ceb96965ed7 |
| https://git.kernel.org/stable/c/eedeb787ebb53de5c5dcf7b7b39d01bf1b0f037d |
