CVE-2024-35808: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: md/dm-raid: don't call md_reap_sync_thread() directly Currently md_reap_sync_thread() is called from raid_message() directly without holding 'reconfig_mutex', this is definitely unsafe because md_reap_sync_thread() can change many fields that is protected by 'reconfig_mutex'. However, hold 'reconfig_mutex' here is still problematic because this will cause deadlock, for example, commit 130443d60b1b ("md: refactor idle/frozen_sync_thread() to fix deadlock"). Fix this problem by using stop_sync_thread() to unregister sync_thread, like md/raid did.

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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-667 CWE-667

Affected Products

Vendor	Product	Versions
linux	linux_kernel	3.10 — 6.7.12
linux	linux_kernel	6.8 — 6.8.3

References

Advisories & Patches

https://git.kernel.org/stable/c/347dcdc15a1706f61aa545ae498ededdf31aeebc https://git.kernel.org/stable/c/9e59b8d76ff511505eb0dd1478329f09e0f04669 https://git.kernel.org/stable/c/cd32b27a66db8776d8b8e82ec7d7dde97a8693b0 https://git.kernel.org/stable/c/347dcdc15a1706f61aa545ae498ededdf31aeebc https://git.kernel.org/stable/c/9e59b8d76ff511505eb0dd1478329f09e0f04669 https://git.kernel.org/stable/c/cd32b27a66db8776d8b8e82ec7d7dde97a8693b0

Frequently Asked Questions

What is CVE-2024-35808? +

In the Linux kernel, the following vulnerability has been resolved: md/dm-raid: don't call md_reap_sync_thread() directly Currently md_reap_sync_thread() is called from raid_message() directly without holding 'reconfig_mutex', this is definitely unsafe because md_reap_sync_thread() can change many fields that is protected by 'reconfig_mutex'. However, hold 'reconfig_mutex' here is still problematic because this will cause deadlock, for example, commit 130443d60b1b ("md: refactor idle/frozen_sync_thread() to fix deadlock"). Fix this problem by using stop_sync_thread() to unregister sync_thread, like md/raid did. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-35808? +

CVE-2024-35808 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-2024-35808? +

CVE-2024-35808 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-2024-35808? +

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-2024-35808