CVE-2026-53384serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 57f83e5dd6a33c4696699954784f8fee789b1d0c before ccdf4510a3873b14e5e348cdb038717996f09fda; from 57f83e5dd6a33c4696699954784f8fee789b1d0c before 511d2b92f8d20de04acafab676150d26fb5c67f4; 57f83e5dd6a33c4696699954784f8fee789b1d0c builds before 07ffe414a708ae60551401cec5d727ed156b8caf; 57f83e5dd6a33c4696699954784f8fee789b1d0c builds before 3d205fe80f2181f0109150ad1fa06ee5bc046935; from 57f83e5dd6a33c4696699954784f8fee789b1d0c before d72650a4f334581b23a1892b888a4cb1be142f76; from 57f83e5dd6a33c4696699954784f8fee789b1d0c before 778b9dda4b24005a27bcd9c35c110bf8d7f259ca; 57f83e5dd6a33c4696699954784f8fee789b1d0c builds before 10fc708b4de7f86002d2d735a2dbf3b5b7f65692 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.19 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.38; from 6.19 before 7.0.14; from 7.1 before 7.1.2 | NVD |
References
- https://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fdapatch
- https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4patch
- https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8cafpatch
- https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935patch
- https://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76patch
- https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259capatch
- https://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.