| 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-2024-38635: soundwire: cadence: fix invalid PDI offset |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| soundwire: cadence: fix invalid PDI offset |
| |
| For some reason, we add an offset to the PDI, presumably to skip the |
| PDI0 and PDI1 which are reserved for BPT. |
| |
| This code is however completely wrong and leads to an out-of-bounds |
| access. We were just lucky so far since we used only a couple of PDIs |
| and remained within the PDI array bounds. |
| |
| A Fixes: tag is not provided since there are no known platforms where |
| the out-of-bounds would be accessed, and the initial code had problems |
| as well. |
| |
| A follow-up patch completely removes this useless offset. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38635 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.278 with commit 002364b2d594a9afc0385c09e00994c510b1d089 |
| Fixed in 5.10.219 with commit fd4bcb991ebaf0d1813d81d9983cfa99f9ef5328 |
| Fixed in 5.15.161 with commit 902f6d656441a511ac25c6cffce74496db10a078 |
| Fixed in 6.1.93 with commit 2ebcaa0e5db9b6044bb487ae1cf41bc601761567 |
| Fixed in 6.6.33 with commit 7eeef1e935d23db5265233d92395bd5c648a4021 |
| Fixed in 6.9.4 with commit 4e99103f757cdf636c6ee860994a19a346a11785 |
| Fixed in 6.10 with commit 8ee1b439b1540ae543149b15a2a61b9dff937d91 |
| |
| 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-2024-38635 |
| 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/soundwire/cadence_master.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/002364b2d594a9afc0385c09e00994c510b1d089 |
| https://git.kernel.org/stable/c/fd4bcb991ebaf0d1813d81d9983cfa99f9ef5328 |
| https://git.kernel.org/stable/c/902f6d656441a511ac25c6cffce74496db10a078 |
| https://git.kernel.org/stable/c/2ebcaa0e5db9b6044bb487ae1cf41bc601761567 |
| https://git.kernel.org/stable/c/7eeef1e935d23db5265233d92395bd5c648a4021 |
| https://git.kernel.org/stable/c/4e99103f757cdf636c6ee860994a19a346a11785 |
| https://git.kernel.org/stable/c/8ee1b439b1540ae543149b15a2a61b9dff937d91 |
