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CVE-2021-47165

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/meson: fix shutdown crash when component not probed When main component is not probed, by example when the dw-hdmi module i…

Published Mar 25, 2024CWE-476EPSS 0.23%

Overview

CVE-2021-47165 is a medium-severity vulnerability. It was published on March 25, 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:

drm/meson: fix shutdown crash when component not probed

When main component is not probed, by example when the dw-hdmi module is

not loaded yet or in probe defer, the following crash appears on shutdown:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038

...

pc : meson_drv_shutdown+0x24/0x50

lr : platform_drv_shutdown+0x20/0x30

...

Call trace:

meson_drv_shutdown+0x24/0x50

platform_drv_shutdown+0x20/0x30

device_shutdown+0x158/0x360

kernel_restart_prepare+0x38/0x48

kernel_restart+0x18/0x68

__do_sys_reboot+0x224/0x250

__arm64_sys_reboot+0x24/0x30

...

Simply check if the priv struct has been allocated before using it.

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/4ce2bf20b4a6e307e114847d60b2bf40a6a1fac0Refgit.kernel.org/stable/c/7cfc4ea78fc103ea51ecbacd9236abb5b1c490d2Refgit.kernel.org/stable/c/b4298d33c1fcce511ffe84d8d3de07e220300f9bRefgit.kernel.org/stable/c/b4b91033a0b11fe9ade58156cd9168f89f4a8c1aRefgit.kernel.org/stable/c/d66083c0d6f5125a4d982aa177dd71ab4cd3d212Refgit.kernel.org/stable/c/e256a0eb43e17209e347409a80805b1659398d68Refgit.kernel.org/stable/c/4ce2bf20b4a6e307e114847d60b2bf40a6a1fac0Refgit.kernel.org/stable/c/7cfc4ea78fc103ea51ecbacd9236abb5b1c490d2Refgit.kernel.org/stable/c/b4298d33c1fcce511ffe84d8d3de07e220300f9bRefgit.kernel.org/stable/c/b4b91033a0b11fe9ade58156cd9168f89f4a8c1a

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47165?

CVE-2021-47165 is a medium-severity vulnerability. It was published on March 25, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47165?

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-2021-47165?

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-2021-47165?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47165 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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