CVE-2023-52457: serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-23 · updated 2026-06-17
Weakness: CWE-416

Description

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 kernel: from 5.4.225 before 5.4.268; from 5.10.156 before 5.10.209; from 5.15.80 before 5.15.148; from 6.0.10 before 6.1.75; from 6.2 before 6.6.14; from 6.7 before 6.7.2 — fixed in 5.10.209, 5.15.148, 5.4.268, 6.1.75, 6.6.14, 6.7.2

How to fix

Upgrade to a fixed version: Linux kernel 5.10.209, 5.15.148, 5.4.268, 6.1.75. Check the vendor advisory for mitigations.

References

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