| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37889: ASoC: ops: Consistently treat platform_max as control value |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ASoC: ops: Consistently treat platform_max as control value |
| |
| This reverts commit 9bdd10d57a88 ("ASoC: ops: Shift tested values in |
| snd_soc_put_volsw() by +min"), and makes some additional related |
| updates. |
| |
| There are two ways the platform_max could be interpreted; the maximum |
| register value, or the maximum value the control can be set to. The |
| patch moved from treating the value as a control value to a register |
| one. When the patch was applied it was technically correct as |
| snd_soc_limit_volume() also used the register interpretation. However, |
| even then most of the other usages treated platform_max as a |
| control value, and snd_soc_limit_volume() has since been updated to |
| also do so in commit fb9ad24485087 ("ASoC: ops: add correct range |
| check for limiting volume"). That patch however, missed updating |
| snd_soc_put_volsw() back to the control interpretation, and fixing |
| snd_soc_info_volsw_range(). The control interpretation makes more |
| sense as limiting is typically done from the machine driver, so it is |
| appropriate to use the customer facing representation rather than the |
| internal codec representation. Update all the code to consistently use |
| this interpretation of platform_max. |
| |
| Finally, also add some comments to the soc_mixer_control struct to |
| hopefully avoid further patches switching between the two approaches. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37889 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15.148 with commit c11fc224e58e7972ffd05b8f25e9b1d6a0b8d562 and fixed in 5.15.180 with commit c402f184a053c8e7ca325e50f04bbbc1e4fee019 |
| Issue introduced in 6.1.74 with commit a50562146d6c7650029a115c96ef9aaa7648c344 and fixed in 6.1.132 with commit 694110bc2407a61f02a770cbb5f39b51e4ec77c6 |
| Issue introduced in 6.6.7 with commit 395e52b7a1ad01e1b51adb09854a0aa5347428de and fixed in 6.6.84 with commit 544055329560d4b64fe204fc6be325ebc24c72ca |
| Issue introduced in 6.7 with commit fb9ad24485087e0f00d84bee7a5914640b2b9024 and fixed in 6.12.20 with commit a46a9371f8b9a0eeff53a21e11ed3b65f52d9cf6 |
| Issue introduced in 6.7 with commit fb9ad24485087e0f00d84bee7a5914640b2b9024 and fixed in 6.13.8 with commit 296c8295ae34045da0214882628d49c1c060dd8a |
| Issue introduced in 6.7 with commit fb9ad24485087e0f00d84bee7a5914640b2b9024 and fixed in 6.14 with commit 0eba2a7e858907a746ba69cd002eb9eb4dbd7bf3 |
| |
| 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-2025-37889 |
| 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: |
| include/sound/soc.h |
| sound/soc/soc-ops.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/c402f184a053c8e7ca325e50f04bbbc1e4fee019 |
| https://git.kernel.org/stable/c/694110bc2407a61f02a770cbb5f39b51e4ec77c6 |
| https://git.kernel.org/stable/c/544055329560d4b64fe204fc6be325ebc24c72ca |
| https://git.kernel.org/stable/c/a46a9371f8b9a0eeff53a21e11ed3b65f52d9cf6 |
| https://git.kernel.org/stable/c/296c8295ae34045da0214882628d49c1c060dd8a |
| https://git.kernel.org/stable/c/0eba2a7e858907a746ba69cd002eb9eb4dbd7bf3 |
