Linux Kernel up to 7.2-rc2 uss720 uss720_probe allocation of resources

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4.8	$0-$5k	3.11-

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 7.2-rc2. This affects the function uss720_probe of the component uss720. Such manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-64338. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 7.2-rc2. Affected by this issue is the function uss720_probe of the component uss720. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: USB: misc: uss720: unregister parport on probe failure uss720_probe() registers a parport before reading the 1284 register used to detect unsupported Belkin F5U002 adapters. If get_1284_register() fails, the error path drops the driver private data and the USB device reference, but leaves the parport device registered. Leaving the port registered is more than a private allocation leak: parport_register_port() has already reserved a parport number and registered the parport bus device, while pp->private_data still points at the private data that the common error path is about to release. Undo the pre-announce registration in the get_1284_register() failure branch before jumping to the common private-data cleanup path. Clear priv->pp first, matching the disconnect path and avoiding a stale pointer in the private data. This issue was identified during our ongoing static-analysis research while reviewing kernel code.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-64338 since 07/19/2026. The exploitation is known to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 329986 (Linux Distros Unpatched Vulnerability : CVE-2026-64338), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 or 7.2-rc3 eliminates this vulnerability. Applying the patch 6bbb98bec71b577fda4f4b48f7aea5874b04a576/93563243377f8e9b46cc94d9c4f06533dd31b141/1712fd71a5aaf81e47c747f180535fa963ad7830/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea/5e62d7857fd51b908b8371062ee839739a086bbe/729b68a5bad71220ae0914c8bdab9488ad5be6c8/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (329986). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.260
• 5.15.211
• 6.1.177
• 6.6.144
• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
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• 6.12.94
• 6.12.95
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
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• 6.18.33
• 6.18.34
• 6.18.35
• 6.18.36
• 6.18.37
• 6.18.38
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.2-rc1
• 7.2-rc2

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 329986
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-64338

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.96/6.18.39/7.1.4/7.2-rc3
Patch: 6bbb98bec71b577fda4f4b48f7aea5874b04a576/93563243377f8e9b46cc94d9c4f06533dd31b141/1712fd71a5aaf81e47c747f180535fa963ad7830/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea/5e62d7857fd51b908b8371062ee839739a086bbe/729b68a5bad71220ae0914c8bdab9488ad5be6c8/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3

Timelineinfo

07/19/2026 CVE reserved
07/25/2026 +6 days Advisory disclosed
07/25/2026 +0 days VulDB entry created
07/26/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64338 (🔒)
GCVE (CVE): GCVE-0-2026-64338
GCVE (VulDB): GCVE-100-383132

Entryinfo

Created: 07/25/2026 15:58
Updated: 07/26/2026 07:14
Changes: 07/25/2026 15:58 (59), 07/26/2026 07:14 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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