| 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-2024-39491: ALSA: hda: cs35l56: Fix lifetime of cs_dsp instance |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ALSA: hda: cs35l56: Fix lifetime of cs_dsp instance |
| |
| The cs_dsp instance is initialized in the driver probe() so it |
| should be freed in the driver remove(). Also fix a missing call |
| to cs_dsp_remove() in the error path of cs35l56_hda_common_probe(). |
| |
| The call to cs_dsp_remove() was being done in the component unbind |
| callback cs35l56_hda_unbind(). This meant that if the driver was |
| unbound and then re-bound it would be using an uninitialized cs_dsp |
| instance. |
| |
| It is best to initialize the cs_dsp instance in probe() so that it |
| can return an error if it fails. The component binding API doesn't |
| have any error handling so there's no way to handle a failure if |
| cs_dsp was initialized in the bind. |
| |
| The Linux kernel CVE team has assigned CVE-2024-39491 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit 73cfbfa9caea8eda54b4c6e49a9555533660aa1e and fixed in 6.6.33 with commit 9054c474f9c219e58a441e401c0e6e38fe713ff1 |
| Issue introduced in 6.6 with commit 73cfbfa9caea8eda54b4c6e49a9555533660aa1e and fixed in 6.9.4 with commit 60d5e087e5f334475b032ad7e6ad849fb998f303 |
| Issue introduced in 6.6 with commit 73cfbfa9caea8eda54b4c6e49a9555533660aa1e and fixed in 6.10 with commit d344873c4cbde249b7152d36a273bcc45864001e |
| |
| 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-2024-39491 |
| 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/cs35l56_hda.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/9054c474f9c219e58a441e401c0e6e38fe713ff1 |
| https://git.kernel.org/stable/c/60d5e087e5f334475b032ad7e6ad849fb998f303 |
| https://git.kernel.org/stable/c/d344873c4cbde249b7152d36a273bcc45864001e |
