VDB-321088 · CVE-2025-38653 · Nessus 266176

Linux Kernel up to 6.16.0 proc proc_reg_open information disclosure

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5.6	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.1.147/6.6.101/6.12.41/6.15.9/6.16.0. This impacts the function proc_reg_open of the component proc. Executing a manipulation can lead to information disclosure. This vulnerability appears as CVE-2025-38653. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.147/6.6.101/6.12.41/6.15.9/6.16.0 and classified as problematic. This vulnerability affects the function proc_reg_open of the component proc. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al Check pde->proc_ops->proc_lseek directly may cause UAF in rmmod scenario. It's a gap in proc_reg_open() after commit 654b33ada4ab("proc: fix UAF in proc_get_inode()"). Followed by AI Viro's suggestion, fix it in same manner.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-38653 since 04/16/2025. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 266176 (Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2025-1208)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 or 6.17-rc1 eliminates this vulnerability. Applying the patch c35b0feb80b48720dfbbf4e33759c7be3faaebb6/33c778ea0bd0fa62ff590497e72562ff90f82b13/fc1072d934f687e1221d685cf1a49a5068318f34/d136502e04d8853a9aecb335d07bbefd7a1519a8/1fccbfbae1dd36198dc47feac696563244ad81d3/ff7ec8dc1b646296f8d94c39339e8d3833d16c05 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (266176) and CERT Bund (WID-SEC-2025-1898). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Debian Linux
Google Cloud Platform
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
NetApp AFF
NetApp ActiveIQ Unified Manager
SUSE openSUSE
Dell Avamar
NetApp FAS
Open Source Linux Kernel
Dell NetWorker
Dell Secure Connect Gateway
Dell ECS

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

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: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒