| 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-2021-47425: i2c: acpi: fix resource leak in reconfiguration device addition |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| i2c: acpi: fix resource leak in reconfiguration device addition |
| |
| acpi_i2c_find_adapter_by_handle() calls bus_find_device() which takes a |
| reference on the adapter which is never released which will result in a |
| reference count leak and render the adapter unremovable. Make sure to |
| put the adapter after creating the client in the same manner that we do |
| for OF. |
| |
| [wsa: fixed title] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47425 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 4.14.251 with commit b8090a84d7758b929d348bafbd86bb7a10c5fb63 |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 4.19.211 with commit 3d9d458a8aaafa47268ea4f1b4114a9f12927989 |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 5.4.153 with commit 60bacf259e8c2eb2324f3e13275200baaee9494b |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 5.10.73 with commit f86de018fd7a24ee07372d55ffa7824f0c674a95 |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 5.14.12 with commit 90f1077c9184ec2ae9989e4642f211263f301694 |
| Issue introduced in 4.8 with commit 525e6fabeae286848592363bda13bc34b59bb5ac and fixed in 5.15 with commit 6558b646ce1c2a872fe1c2c7cb116f05a2c1950f |
| |
| 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-2021-47425 |
| 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/i2c-core-acpi.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/b8090a84d7758b929d348bafbd86bb7a10c5fb63 |
| https://git.kernel.org/stable/c/3d9d458a8aaafa47268ea4f1b4114a9f12927989 |
| https://git.kernel.org/stable/c/60bacf259e8c2eb2324f3e13275200baaee9494b |
| https://git.kernel.org/stable/c/f86de018fd7a24ee07372d55ffa7824f0c674a95 |
| https://git.kernel.org/stable/c/90f1077c9184ec2ae9989e4642f211263f301694 |
| https://git.kernel.org/stable/c/6558b646ce1c2a872fe1c2c7cb116f05a2c1950f |
