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CVE-2023-52877

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm() It is possible that typec_register_partner() returns ERR_PTR o…

Published May 21, 2024CWE-476EPSS 0.22%

Overview

CVE-2023-52877 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: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm()

It is possible that typec_register_partner() returns ERR_PTR on failure.

When port->partner is an error, a NULL pointer dereference may occur as

shown below.

[91222.095236][ T319] typec port0: failed to register partner (-17)

...

[91225.061491][ T319] Unable to handle kernel NULL pointer dereference

at virtual address 000000000000039f

[91225.274642][ T319] pc : tcpm_pd_data_request+0x310/0x13fc

[91225.274646][ T319] lr : tcpm_pd_data_request+0x298/0x13fc

[91225.308067][ T319] Call trace:

[91225.308070][ T319] tcpm_pd_data_request+0x310/0x13fc

[91225.308073][ T319] tcpm_pd_rx_handler+0x100/0x9e8

[91225.355900][ T319] kthread_worker_fn+0x178/0x58c

[91225.355902][ T319] kthread+0x150/0x200

[91225.355905][ T319] ret_from_fork+0x10/0x30

Add a check for port->partner to avoid dereferencing a NULL pointer.

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/4987daf86c152ff882d51572d154ad12e4ff3a4bRefgit.kernel.org/stable/c/9ee038590d808a95d16adf92818dcd4752273c08Refgit.kernel.org/stable/c/b37a168c0137156042a0ca9626651b5a789e822bRefgit.kernel.org/stable/c/e5f53a68a596e04df3fde3099273435a30b6fdacRefgit.kernel.org/stable/c/e7a802447c491903aa7cb45967aa2a934a4e63fcRefgit.kernel.org/stable/c/4987daf86c152ff882d51572d154ad12e4ff3a4bRefgit.kernel.org/stable/c/9ee038590d808a95d16adf92818dcd4752273c08Refgit.kernel.org/stable/c/b37a168c0137156042a0ca9626651b5a789e822bRefgit.kernel.org/stable/c/e5f53a68a596e04df3fde3099273435a30b6fdacRefgit.kernel.org/stable/c/e7a802447c491903aa7cb45967aa2a934a4e63fc

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52877?

CVE-2023-52877 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-2023-52877?

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-2023-52877?

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-2023-52877?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52877 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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