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CVE-2023-52477

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: hub: Guard against accesses to uninitialized BOS descriptors Many functions in drivers/usb/core/hub.c and drivers/usb/core…

Published Feb 29, 2024CWE-476EPSS 0.23%

Overview

CVE-2023-52477 is a medium-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

usb: hub: Guard against accesses to uninitialized BOS descriptors

Many functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h

access fields inside udev->bos without checking if it was allocated and

initialized. If usb_get_bos_descriptor() fails for whatever

reason, udev->bos will be NULL and those accesses will result in a

crash:

BUG: kernel NULL pointer dereference, address: 0000000000000018

PGD 0 P4D 0

Oops: 0000 [#1] PREEMPT SMP NOPTI

CPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 <HASH:1f9e 1>

Hardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021

Workqueue: usb_hub_wq hub_event

RIP: 0010:hub_port_reset+0x193/0x788

Code: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9

RSP: 0018:ffffab740c53fcf8 EFLAGS

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/136f69a04e71ba3458d137aec3bb2ce1232c0289Refgit.kernel.org/stable/c/241f230324337ed5eae3846a554fb6d15169872cRefgit.kernel.org/stable/c/528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6bRefgit.kernel.org/stable/c/6ad3e9fd3632106696692232bf7ff88b9f7e1bc3Refgit.kernel.org/stable/c/8e7346bfea56453e31b7421c1c17ca2fb9ed613dRefgit.kernel.org/stable/c/c64e4dca9aefd232b17ac4c779b608b286654e81Refgit.kernel.org/stable/c/f74a7afc224acd5e922c7a2e52244d891bbe44eeRefgit.kernel.org/stable/c/fb9895ab9533534335fa83d70344b397ac862c81Refgit.kernel.org/stable/c/136f69a04e71ba3458d137aec3bb2ce1232c0289Refgit.kernel.org/stable/c/241f230324337ed5eae3846a554fb6d15169872c

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52477?

CVE-2023-52477 is a medium-severity vulnerability. It was published on February 29, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52477?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-52477?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-52477?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52477 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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