CVE-2026-53384serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails
- 9.8CriticalCVSS base score
- 0.52%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
ID reserved
By Linux
- 40 days later
· 40 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.52% · top 56% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < ccdf4510a3873b14e5e348cdb038717996f09fda
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < 511d2b92f8d20de04acafab676150d26fb5c67f4
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < 07ffe414a708ae60551401cec5d727ed156b8caf
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < 3d205fe80f2181f0109150ad1fa06ee5bc046935
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < d72650a4f334581b23a1892b888a4cb1be142f76
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < 778b9dda4b24005a27bcd9c35c110bf8d7f259ca
- affected 57f83e5dd6a33c4696699954784f8fee789b1d0c – < 10fc708b4de7f86002d2d735a2dbf3b5b7f65692
- affected 5.19
- unaffected < 5.19
- unaffected 6.1.177 – ≤ 6.1.*
- unaffected 6.6.144 – ≤ 6.6.*
- unaffected 6.12.95 – ≤ 6.12.*
- unaffected 6.18.38 – ≤ 6.18.*
- unaffected 7.0.14 – ≤ 7.0.*
- unaffected 7.1.2 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fda (opens in a new tab)
- https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4 (opens in a new tab)
- https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8caf (opens in a new tab)
- https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935 (opens in a new tab)
- https://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76 (opens in a new tab)
- https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259ca (opens in a new tab)
- https://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45506 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53384)Record last updated .