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CVE-2021-47273

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled When only PHY1 is used (for example on Odroid-HC4), the regm…

Published May 21, 2024CWE-476EPSS 0.22%

Overview

CVE-2021-47273 is a medium-severity vulnerability. It was published on May 21, 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: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled

When only PHY1 is used (for example on Odroid-HC4), the regmap init code

uses the usb2 ports when doesn't initialize the PHY1 regmap entry.

This fixes:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020

...

pc : regmap_update_bits_base+0x40/0xa0

lr : dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8

...

Call trace:

regmap_update_bits_base+0x40/0xa0

dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8

dwc3_meson_g12a_usb2_init+0x7c/0xc8

dwc3_meson_g12a_usb_init+0x28/0x48

dwc3_meson_g12a_probe+0x298/0x540

platform_probe+0x70/0xe0

really_probe+0xf0/0x4d8

driver_probe_device+0xfc/0x168

...

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/4d2aa178d2ad2fb156711113790dde13e9aa2376Refgit.kernel.org/stable/c/750a0d75564293be3ed50f13ef7f38ab75106421Refgit.kernel.org/stable/c/d8dd3754e707104a34f8ec595034d503ea8871a2Refgit.kernel.org/stable/c/4d2aa178d2ad2fb156711113790dde13e9aa2376Refgit.kernel.org/stable/c/750a0d75564293be3ed50f13ef7f38ab75106421Refgit.kernel.org/stable/c/d8dd3754e707104a34f8ec595034d503ea8871a2

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47273?

CVE-2021-47273 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47273?

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-2021-47273?

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-2021-47273?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47273 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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