| 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-2022-48927: iio: adc: tsc2046: fix memory corruption by preventing array overflow |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iio: adc: tsc2046: fix memory corruption by preventing array overflow |
| |
| On one side we have indio_dev->num_channels includes all physical channels + |
| timestamp channel. On other side we have an array allocated only for |
| physical channels. So, fix memory corruption by ARRAY_SIZE() instead of |
| num_channels variable. |
| |
| Note the first case is a cleanup rather than a fix as the software |
| timestamp channel bit in active_scanmask is never set by the IIO core. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48927 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 9374e8f5a38defe90bc65b2decf317c1c62d91dd and fixed in 5.15.26 with commit 0cb9b2f73c182d242a640e512f4785c7c504512f |
| Issue introduced in 5.14 with commit 9374e8f5a38defe90bc65b2decf317c1c62d91dd and fixed in 5.16.12 with commit 082d2c047b0d305bb0b6e9f9d671a09470e2db2d |
| Issue introduced in 5.14 with commit 9374e8f5a38defe90bc65b2decf317c1c62d91dd and fixed in 5.17 with commit b7a78a8adaa8849c02f174d707aead0f85dca0da |
| |
| 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-2022-48927 |
| 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/iio/adc/ti-tsc2046.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/0cb9b2f73c182d242a640e512f4785c7c504512f |
| https://git.kernel.org/stable/c/082d2c047b0d305bb0b6e9f9d671a09470e2db2d |
| https://git.kernel.org/stable/c/b7a78a8adaa8849c02f174d707aead0f85dca0da |
