CVE-2023-52457: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed Returning an error code from .remove() makes the driver core emit the little helpful error message: remove callback returned a non-zero value. This will be ignored. and then remove the device anyhow. So all resources that were not freed are leaked in this case. Skipping serial8250_unregister_port() has the potential to keep enough of the UART around to trigger a use-after-free. So replace the error return (and with it the little helpful error message) by a more useful error message and continue to cleanup.

Affected products

• Linux Linux Kernel: from 5.4.225, before 5.4.268 (fixed in 5.4.268); from 5.10.156, before 5.10.209 (fixed in 5.10.209); from 5.15.80, before 5.15.148 (fixed in 5.15.148); from 6.0.10, before 6.1.75 (fixed in 6.1.75); from 6.2, before 6.6.14 (fixed in 6.6.14); from 6.7, before 6.7.2 (fixed in 6.7.2)

Published 2024-02-23. Last modified 2026-06-17.