| 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-2024-58078: misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors |
| |
| misc_minor_alloc was allocating id using ida for minor only in case of |
| MISC_DYNAMIC_MINOR but misc_minor_free was always freeing ids |
| using ida_free causing a mismatch and following warn: |
| > > WARNING: CPU: 0 PID: 159 at lib/idr.c:525 ida_free+0x3e0/0x41f |
| > > ida_free called for id=127 which is not allocated. |
| > > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
| ... |
| > > [<60941eb4>] ida_free+0x3e0/0x41f |
| > > [<605ac993>] misc_minor_free+0x3e/0xbc |
| > > [<605acb82>] misc_deregister+0x171/0x1b3 |
| |
| misc_minor_alloc is changed to allocate id from ida for all minors |
| falling in the range of dynamic/ misc dynamic minors |
| |
| The Linux kernel CVE team has assigned CVE-2024-58078 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.6.78 with commit 3df72111c39f7e4c5029c9ff720b56ec2e05b764 |
| Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.12.14 with commit 8b4120b3e060e137eaa8dc76a1c40401088336e5 |
| Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.13.3 with commit 6635332d246d7db89b90e145f2bf937406cecaf0 |
| Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.14 with commit 6d04d2b554b14ae6c428a9c60b6c85f1e5c89f68 |
| |
| 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-2024-58078 |
| 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/char/misc.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/3df72111c39f7e4c5029c9ff720b56ec2e05b764 |
| https://git.kernel.org/stable/c/8b4120b3e060e137eaa8dc76a1c40401088336e5 |
| https://git.kernel.org/stable/c/6635332d246d7db89b90e145f2bf937406cecaf0 |
| https://git.kernel.org/stable/c/6d04d2b554b14ae6c428a9c60b6c85f1e5c89f68 |
