CVE-2024-39491: linux kernel — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-908 CWE-908

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.6 — 6.6.33
linux	linux_kernel	6.7 — 6.9.4

References

Advisories & Patches

https://git.kernel.org/stable/c/60d5e087e5f334475b032ad7e6ad849fb998f303 https://git.kernel.org/stable/c/9054c474f9c219e58a441e401c0e6e38fe713ff1 https://git.kernel.org/stable/c/d344873c4cbde249b7152d36a273bcc45864001e https://git.kernel.org/stable/c/60d5e087e5f334475b032ad7e6ad849fb998f303 https://git.kernel.org/stable/c/9054c474f9c219e58a441e401c0e6e38fe713ff1 https://git.kernel.org/stable/c/d344873c4cbde249b7152d36a273bcc45864001e

Frequently Asked Questions

What is CVE-2024-39491? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-39491? +

CVE-2024-39491 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-39491? +

CVE-2024-39491 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39491? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-39491