| 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-2024-38388: ALSA: hda/cs_dsp_ctl: Use private_free for control cleanup |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: hda/cs_dsp_ctl: Use private_free for control cleanup |
| |
| Use the control private_free callback to free the associated data |
| block. This ensures that the memory won't leak, whatever way the |
| control gets destroyed. |
| |
| The original implementation didn't actually remove the ALSA |
| controls in hda_cs_dsp_control_remove(). It only freed the internal |
| tracking structure. This meant it was possible to remove/unload the |
| amp driver while leaving its ALSA controls still present in the |
| soundcard. Obviously attempting to access them could cause segfaults |
| or at least dereferencing stale pointers. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38388 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit 3233b978af23f11b4ad4f7f11a9a64bd05702b1f and fixed in 6.1.93 with commit 191dc1b2ff0fb35e7aff15a53224837637df8bff |
| Issue introduced in 6.0 with commit 3233b978af23f11b4ad4f7f11a9a64bd05702b1f and fixed in 6.6.33 with commit 6e359be4975006ff72818e79dad8fe48293f2eb2 |
| Issue introduced in 6.0 with commit 3233b978af23f11b4ad4f7f11a9a64bd05702b1f and fixed in 6.9.4 with commit 3291486af5636540980ea55bae985f3eaa5b0740 |
| Issue introduced in 6.0 with commit 3233b978af23f11b4ad4f7f11a9a64bd05702b1f and fixed in 6.10 with commit 172811e3a557d8681a5e2d0f871dc04a2d17eb13 |
| |
| 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-2024-38388 |
| 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: |
| sound/pci/hda/hda_cs_dsp_ctl.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/191dc1b2ff0fb35e7aff15a53224837637df8bff |
| https://git.kernel.org/stable/c/6e359be4975006ff72818e79dad8fe48293f2eb2 |
| https://git.kernel.org/stable/c/3291486af5636540980ea55bae985f3eaa5b0740 |
| https://git.kernel.org/stable/c/172811e3a557d8681a5e2d0f871dc04a2d17eb13 |
