| 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-2022-49555: Bluetooth: hci_qca: Use del_timer_sync() before freeing |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Bluetooth: hci_qca: Use del_timer_sync() before freeing |
| |
| While looking at a crash report on a timer list being corrupted, which |
| usually happens when a timer is freed while still active. This is |
| commonly triggered by code calling del_timer() instead of |
| del_timer_sync() just before freeing. |
| |
| One possible culprit is the hci_qca driver, which does exactly that. |
| |
| Eric mentioned that wake_retrans_timer could be rearmed via the work |
| queue, so also move the destruction of the work queue before |
| del_timer_sync(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49555 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.3 with commit 0ff252c1976da5d80db1377eb39b551931e61826 and fixed in 5.10.120 with commit 4989bb03342941f2b730b37dfa38bce27b543661 |
| Issue introduced in 4.3 with commit 0ff252c1976da5d80db1377eb39b551931e61826 and fixed in 5.15.45 with commit db03727b4bbbbb36e6ef4cb655c670eefb6448e9 |
| Issue introduced in 4.3 with commit 0ff252c1976da5d80db1377eb39b551931e61826 and fixed in 5.17.13 with commit 37d17f63d085d601011964ade7371aeebeb6ed4b |
| Issue introduced in 4.3 with commit 0ff252c1976da5d80db1377eb39b551931e61826 and fixed in 5.18.2 with commit 2717654ae022e6ea959a4b7b762702fe1a4690c2 |
| Issue introduced in 4.3 with commit 0ff252c1976da5d80db1377eb39b551931e61826 and fixed in 5.19 with commit 72ef98445aca568a81c2da050532500a8345ad3a |
| |
| 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-2022-49555 |
| 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/bluetooth/hci_qca.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/4989bb03342941f2b730b37dfa38bce27b543661 |
| https://git.kernel.org/stable/c/db03727b4bbbbb36e6ef4cb655c670eefb6448e9 |
| https://git.kernel.org/stable/c/37d17f63d085d601011964ade7371aeebeb6ed4b |
| https://git.kernel.org/stable/c/2717654ae022e6ea959a4b7b762702fe1a4690c2 |
| https://git.kernel.org/stable/c/72ef98445aca568a81c2da050532500a8345ad3a |
