CVE-2024-26716: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: usb: core: Prevent null pointer dereference in update_port_device_state Currently, the function update_port_device_state gets the usb_hub from udev->parent by calling usb_hub_to_struct_hub. However, in case the actconfig or the maxchild is 0, the usb_hub would be NULL and upon further accessing to get port_dev would result in null pointer dereference. Fix this by introducing an if check after the usb_hub is populated.

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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-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.5 — 6.6.18
linux	linux_kernel	6.7 — 6.7.6
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/12783c0b9e2c7915a50d5ec829630ff2da50472c https://git.kernel.org/stable/c/465b545d1d7ef282192ddd4439b08279bdb13f6f https://git.kernel.org/stable/c/ed85777c640cf9e6920bb1b60ed8cd48e1f4d873 https://git.kernel.org/stable/c/12783c0b9e2c7915a50d5ec829630ff2da50472c https://git.kernel.org/stable/c/465b545d1d7ef282192ddd4439b08279bdb13f6f https://git.kernel.org/stable/c/ed85777c640cf9e6920bb1b60ed8cd48e1f4d873

Frequently Asked Questions

What is CVE-2024-26716? +

In the Linux kernel, the following vulnerability has been resolved: usb: core: Prevent null pointer dereference in update_port_device_state Currently, the function update_port_device_state gets the usb_hub from udev->parent by calling usb_hub_to_struct_hub. However, in case the actconfig or the maxchild is 0, the usb_hub would be NULL and upon further accessing to get port_dev would result in null pointer dereference. Fix this by introducing an if check after the usb_hub is populated. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26716? +

CVE-2024-26716 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-2024-26716? +

CVE-2024-26716 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-2024-26716? +

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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