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Review reviewCritical

CVE-2026-53384

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data...

CVSS
9.8
EPSS
0.49%
39.3% percentile
CISA KEV
Not listed
Published
2026.07.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.49%
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 57f83e5dd6a33c4696699954784f8fee789b1d0c < ccdf4510a3873b14e5e348cdb038717996f09fda, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 511d2b92f8d20de04acafab676150d26fb5c67f4, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 07ffe414a708ae60551401cec5d727ed156b8caf, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 3d205fe80f2181f0109150ad1fa06ee5bc046935, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < d72650a4f334581b23a1892b888a4cb1be142f76, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 778b9dda4b24005a27bcd9c35c110bf8d7f259ca, >= 57f83e5dd6a33c4696699954784f8fee789b1d0c < 10fc708b4de7f86002d2d735a2dbf3b5b7f65692, >= 5.19, >= 5.9 < 6.1.177, >= 6.2 < 6.6.144, >= 6.7 < 6.12.95, >= 6.13 < 6.18.38, >= 6.19 < 7.0.14, >= 7.1 < 7.1.2
Fixed versions
6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.0.14, 7.1.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416