CVE-2023-53049

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978Patch
• https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693Patch
• https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44Patch
• https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0Patch
• https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764Patch