CVE-2024-41035

MEDIUM
Published Jul 29, 2024 Modified Nov 3, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix duplicate endpoint bug by clearing reserved bits in the descriptor Syzbot has identified a bug in usbcore (see the Closes: tag below) caused by our assumption that the reserved bits in an endpoint descriptor's bEndpointAddress field will always be 0. As a result of the bug, the endpoint_is_duplicate() routine in config.c (and possibly other routines as well) may believe that two descriptors are for distinct endpoints, even though they have the same direction and endpoint number. This can lead to confusion, including the bug identified by syzbot (two descriptors with matching endpoint numbers and directions, where one was interrupt and the other was bulk). To fix the bug, we will clear the reserved bits in bEndpointAddress when we parse the descriptor. (Note that both the USB-2.0 and USB-3.1 specs say these bits are "Reserved, reset to zero".) This requires us to make a copy of the descriptor earlier in usb_parse_endpoint() and use the copy instead of the original when checking for duplicates.

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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

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
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
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/2bd8534a1b83c65702aec3cab164170f8e584188 https://git.kernel.org/stable/c/37514a5c1251a8c5c95c323f55050736e7069ac7 https://git.kernel.org/stable/c/60abea505b726b38232a0ef410d2bd1994a77f78 https://git.kernel.org/stable/c/647d61aef106dbed9c70447bcddbd4968e67ca64 https://git.kernel.org/stable/c/9edcf317620d7c6a8354911b69b874cf89716646 https://git.kernel.org/stable/c/a368ecde8a5055b627749b09c6218ef793043e47 https://git.kernel.org/stable/c/d09dd21bb5215d583ca9a1cb1464dbc77a7e88cf https://git.kernel.org/stable/c/d8418fd083d1b90a6c007cf8dcf81aeae274727b https://git.kernel.org/stable/c/2bd8534a1b83c65702aec3cab164170f8e584188 https://git.kernel.org/stable/c/37514a5c1251a8c5c95c323f55050736e7069ac7 https://git.kernel.org/stable/c/60abea505b726b38232a0ef410d2bd1994a77f78 https://git.kernel.org/stable/c/647d61aef106dbed9c70447bcddbd4968e67ca64 https://git.kernel.org/stable/c/9edcf317620d7c6a8354911b69b874cf89716646 https://git.kernel.org/stable/c/a368ecde8a5055b627749b09c6218ef793043e47 https://git.kernel.org/stable/c/d09dd21bb5215d583ca9a1cb1464dbc77a7e88cf https://git.kernel.org/stable/c/d8418fd083d1b90a6c007cf8dcf81aeae274727b

Frequently Asked Questions

What is CVE-2024-41035? +
In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix duplicate endpoint bug by clearing reserved bits in the descriptor Syzbot has identified a bug in usbcore (see the Closes: tag below) caused by our assumption that the reserved bits in an endpoint descriptor's bEndpointAddress field will always be 0. As a result of the bug, the endpoint_is_duplicate() routine in config.c (and possibly other routines as well) may believe that two descriptors are for distinct endpoints, even though they have the same direction and endpoint number. This can lead to confusion, including the bug identified by syzbot (two descriptors with matching endpoint numbers and directions, where one was interrupt and the other was bulk). To fix the bug, we will clear the reserved bits in bEndpointAddress when we parse the descriptor. (Note that both the USB-2.0 and USB-3.1 specs say these bits are "Reserved, reset to zero".) This requires us to make a copy of the descriptor earlier in usb_parse_endpoint() and use the copy instead of the original when checking for duplicates. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-41035? +
CVE-2024-41035 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-2024-41035? +
CVE-2024-41035 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-2024-41035? +
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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