Linux Kernel up to 7.1.1 8250_dw 8250_dw.c dw8250_probe use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.6$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as very critical, was found in Linux Kernel up to 7.1.1. Affected by this vulnerability is the function dw8250_probe of the file drivers/tty/serial/8250/8250_dw.c of the component 8250_dw. Executing a manipulation can lead to use after free. This vulnerability is handled as CVE-2026-53384. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as very critical was found in Linux Kernel up to 7.1.1. This vulnerability affects the function dw8250_probe of the file drivers/tty/serial/8250/8250_dw.c of the component 8250_dw. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-53384 since 06/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/06/2026).

The vulnerability scanner Nessus provides a plugin with the ID 330014 (Debian dla-4700 : linux-config-6.1 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.0.14, 7.1.2 or 7.2-rc1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (330014) and CERT Bund (WID-SEC-2026-2403). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Red Hat Enterprise Linux
  • RESF Rocky Linux
  • SUSE openSUSE
  • Ubuntu Linux
  • Oracle Linux
  • Open Source Linux Kernel

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (Linux): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 330014
Nessus Name: Debian dla-4700 : linux-config-6.1 - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.177/6.6.144/6.12.95/6.18.38/7.0.14/7.1.2/7.2-rc1

Timelineinfo

06/09/2026 CVE reserved
07/19/2026 +40 days Advisory disclosed
07/19/2026 +0 days VulDB entry created
08/06/2026 +18 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-53384 (🔒)
GCVE (CVE): GCVE-0-2026-53384
GCVE (VulDB): GCVE-100-380116
CERT Bund: WID-SEC-2026-2403 - Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Entryinfo

Created: 07/19/2026 14:39
Updated: 08/06/2026 03:18
Changes: 07/19/2026 14:39 (56), 07/27/2026 05:04 (5), 07/30/2026 06:45 (10), 08/06/2026 03:18 (7)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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