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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbdc62f2bae8fb0e8e99574de5232f0a3c54a27df < a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0affected
LinuxLinuxbdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 7dd27aed9c456670b3882877ef17a48195f21693affected
LinuxLinuxbdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 1c5abcb13491da8c049f20462189c12c753ba978affected
LinuxLinuxbdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 7ef0423e43f877a328454059d46763043ce3da44affected
LinuxLinuxbdc62f2bae8fb0e8e99574de5232f0a3c54a27df < f87fb985452ab2083967103ac00bfd68fb182764affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux5.10.177 <= 5.10.*unaffected
LinuxLinux5.15.105 <= 5.15.*unaffected
LinuxLinux6.1.22 <= 6.1.*unaffected
LinuxLinux6.2.9 <= 6.2.*unaffected
LinuxLinux6.3 <= *unaffected

Weaknesses

References