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CVE-2026-53384

serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.0.14, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

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 is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in ccdf4510a3873b14e5e348cdb038717996f09fda; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in 511d2b92f8d20de04acafab676150d26fb5c67f4; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in 07ffe414a708ae60551401cec5d727ed156b8caf; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in 3d205fe80f2181f0109150ad1fa06ee5bc046935; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in d72650a4f334581b23a1892b888a4cb1be142f76; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in 778b9dda4b24005a27bcd9c35c110bf8d7f259ca; From 57f83e5dd6a33c4696699954784f8fee789b1d0c · fixed in 10fc708b4de7f86002d2d735a2dbf3b5b7f65692

  • Linux Linux

    5.19

  • KernelLinux

    From 5.19.0 · fixed in 6.1.177; From 6.2.0 · fixed in 6.6.144; From 6.7.0 · fixed in 6.12.95; From 6.13.0 · fixed in 6.18.38; From 6.19.0 · fixed in 7.0.14; From 7.1.0 · fixed in 7.1.2

References 7

git.kernel.org