| 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-2023-52614: PM / devfreq: Fix buffer overflow in trans_stat_show |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| PM / devfreq: Fix buffer overflow in trans_stat_show |
| |
| Fix buffer overflow in trans_stat_show(). |
| |
| Convert simple snprintf to the more secure scnprintf with size of |
| PAGE_SIZE. |
| |
| Add condition checking if we are exceeding PAGE_SIZE and exit early from |
| loop. Also add at the end a warning that we exceeded PAGE_SIZE and that |
| stats is disabled. |
| |
| Return -EFBIG in the case where we don't have enough space to write the |
| full transition table. |
| |
| Also document in the ABI that this function can return -EFBIG error. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52614 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 5.10.216 with commit 087de000e4f8c878c81d9dd3725f00a1d292980c |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 5.15.149 with commit 796d3fad8c35ee9df9027899fb90ceaeb41b958f |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 6.1.76 with commit 8a7729cda2dd276d7a3994638038fb89035b6f2c |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 6.6.15 with commit a979f56aa4b93579cf0e4265ae04d7e9300fd3e8 |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 6.7.3 with commit eaef4650fa2050147ca25fd7ee43bc0082e03c87 |
| Issue introduced in 3.8 with commit e552bbaf5b987f57c43e6981a452b8a3c700b1ae and fixed in 6.8 with commit 08e23d05fa6dc4fc13da0ccf09defdd4bbc92ff4 |
| |
| 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-2023-52614 |
| 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: |
| Documentation/ABI/testing/sysfs-class-devfreq |
| drivers/devfreq/devfreq.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/087de000e4f8c878c81d9dd3725f00a1d292980c |
| https://git.kernel.org/stable/c/796d3fad8c35ee9df9027899fb90ceaeb41b958f |
| https://git.kernel.org/stable/c/8a7729cda2dd276d7a3994638038fb89035b6f2c |
| https://git.kernel.org/stable/c/a979f56aa4b93579cf0e4265ae04d7e9300fd3e8 |
| https://git.kernel.org/stable/c/eaef4650fa2050147ca25fd7ee43bc0082e03c87 |
| https://git.kernel.org/stable/c/08e23d05fa6dc4fc13da0ccf09defdd4bbc92ff4 |
