CVE-2024-42224

MEDIUM
Published Jul 30, 2024 Modified Nov 3, 2025 CWE-754

Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Correct check for empty list Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL. This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists. Instead, use list_first_entry_or_null() which does return NULL if the list is empty. Flagged by Smatch. Compile tested only.

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CVSS v3.1 Score

6.1
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Weakness Type (CWE)

CWE-754 CWE-754

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/2a2fe25a103cef73cde356e6d09da10f607e93f5 https://git.kernel.org/stable/c/3bf8d70e1455f87856640c3433b3660a31001618 https://git.kernel.org/stable/c/3f25b5f1635449036692a44b771f39f772190c1d https://git.kernel.org/stable/c/47d28dde172696031c880c5778633cdca30394ee https://git.kernel.org/stable/c/4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b https://git.kernel.org/stable/c/8c2c3cca816d074c75a2801d1ca0dea7b0148114 https://git.kernel.org/stable/c/aa03f591ef31ba603a4a99d05d25a0f21ab1cd89 https://git.kernel.org/stable/c/f75625db838ade28f032dacd0f0c8baca42ecde4 https://git.kernel.org/stable/c/2a2fe25a103cef73cde356e6d09da10f607e93f5 https://git.kernel.org/stable/c/3bf8d70e1455f87856640c3433b3660a31001618 https://git.kernel.org/stable/c/3f25b5f1635449036692a44b771f39f772190c1d https://git.kernel.org/stable/c/47d28dde172696031c880c5778633cdca30394ee https://git.kernel.org/stable/c/4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b https://git.kernel.org/stable/c/8c2c3cca816d074c75a2801d1ca0dea7b0148114 https://git.kernel.org/stable/c/aa03f591ef31ba603a4a99d05d25a0f21ab1cd89 https://git.kernel.org/stable/c/f75625db838ade28f032dacd0f0c8baca42ecde4

Frequently Asked Questions

What is CVE-2024-42224? +
In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Correct check for empty list Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL. This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists. Instead, use list_first_entry_or_null() which does return NULL if the list is empty. Flagged by Smatch. Compile tested only. It has a CVSS v3.1 base score of 6.1 (MEDIUM).
How severe is CVE-2024-42224? +
CVE-2024-42224 has a CVSS v3.1 score of 6.1 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-2024-42224? +
CVE-2024-42224 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-2024-42224? +
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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