| 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-2024-42132: bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX |
| |
| Syzbot hit warning in hci_conn_del() caused by freeing handle that was |
| not allocated using ida allocator. |
| |
| This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by |
| hci_le_big_sync_established_evt(), which makes code think it's unset |
| connection. |
| |
| Add same check for handle upper bound as in hci_conn_set_handle() to |
| prevent warning. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42132 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6.2 with commit 84cb0143fb8a03bf941c7aaedd56c938c99dafad and fixed in 6.6.39 with commit 4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4 |
| Issue introduced in 6.7 with commit 181a42edddf51d5d9697ecdf365d72ebeab5afb0 and fixed in 6.9.9 with commit d311036696fed778301d08a71a4bef737b86d8c5 |
| Issue introduced in 6.7 with commit 181a42edddf51d5d9697ecdf365d72ebeab5afb0 and fixed in 6.10 with commit 1cc18c2ab2e8c54c355ea7c0423a636e415a0c23 |
| Issue introduced in 6.5.12 with commit e9f708beada55426c8d678e2f46af659eb5bf4f0 |
| |
| 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-2024-42132 |
| 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: |
| net/bluetooth/hci_conn.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/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4 |
| https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5 |
| https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23 |
