| 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-2022-49653: i2c: piix4: Fix a memory leak in the EFCH MMIO support |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| i2c: piix4: Fix a memory leak in the EFCH MMIO support |
| |
| The recently added support for EFCH MMIO regions introduced a memory |
| leak in that code path. The leak is caused by the fact that |
| release_resource() merely removes the resource from the tree but does |
| not free its memory. We need to call release_mem_region() instead, |
| which does free the memory. As a nice side effect, this brings back |
| some symmetry between the legacy and MMIO paths. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49653 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15.42 with commit 4b965566ca26e83553d92b8c57050e5d59911806 and fixed in 5.15.54 with commit d2bf1a6480e8d44658a8ac3bdcec081238873212 |
| Issue introduced in 5.18 with commit 7c148722d074c29fb998578eea5de3c14b9608c9 and fixed in 5.18.11 with commit a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19 |
| Issue introduced in 5.18 with commit 7c148722d074c29fb998578eea5de3c14b9608c9 and fixed in 5.19 with commit 8ad59b397f86a4d8014966fdc0552095a0c4fb2b |
| Issue introduced in 5.17.10 with commit f48190bca4b1a397f2e050efea2c8e8e72049ec8 |
| |
| 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-2022-49653 |
| 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/i2c/busses/i2c-piix4.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/d2bf1a6480e8d44658a8ac3bdcec081238873212 |
| https://git.kernel.org/stable/c/a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19 |
| https://git.kernel.org/stable/c/8ad59b397f86a4d8014966fdc0552095a0c4fb2b |
