Linux Kernel up to 5.10.176/5.15.104/6.1.21/6.2.8 ucsi_connector_change null pointer dereference

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.10.176/5.15.104/6.1.21/6.2.8. This affects the function ucsi_connector_change. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2023-53049. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.176/5.15.104/6.1.21/6.2.8. It has been rated as critical. Affected by this issue is the function ucsi_connector_change. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: usb: ucsi: Fix NULL pointer deref in ucsi_connector_change() When ucsi_init() fails, ucsi->connector is NULL, yet in case of ucsi_acpi we may still get events which cause the ucs_acpi code to call ucsi_connector_change(), which then derefs the NULL ucsi->connector pointer. Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init() has succeeded, so that ucsi_connector_change() ignores the events because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2023-53049 since 04/16/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 279319 (EulerOS Virtualization 2.13.0 : kernel (EulerOS-SA-2025-2581)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.177, 5.15.105, 6.1.22 or 6.2.9 eliminates this vulnerability. Applying the patch a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0/7dd27aed9c456670b3882877ef17a48195f21693/1c5abcb13491da8c049f20462189c12c753ba978/7ef0423e43f877a328454059d46763043ce3da44/f87fb985452ab2083967103ac00bfd68fb182764 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (279319). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.176
• 5.15.104
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion