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CVE-2026-59678— portprotonqt allows any users to mount and unmount arbitrary file systems and modify the network configuration via NetworkManager

Quick assessment

Affected
Linux-Gaming PortProtonQt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux-Gaming PortProtonQt是俄罗斯Linux-Gaming公司的一款游戏兼容层配置工具。 Linux-Gaming PortProtonQt 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe之前版本存在授权问题漏洞，该漏洞源于授权问题，可能导致任何用户挂载和卸载任意文件系统并通过NetworkManager修改网络配置。

CVSS 7.1 · High EPSS 0.12% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
Linux-Gaming PortProtonQt < 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe affected
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I. Basic Information for CVE-2026-59678

Vulnerability Information
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Vulnerability Title
portprotonqt allows any users to mount and unmount arbitrary file systems and modify the network configuration via NetworkManager
Source: CVE Program / CVE List V5
Vulnerability Description
An Incorrect Authorization vulnerability in Linux-Gaming PortProtonQt allows any users to mount and unmount arbitrary file systems and modify the network configuration via NetworkManager. This issue affects PortProtonQt before 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Linux-Gaming PortProtonQt 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux-Gaming PortProtonQt是俄罗斯Linux-Gaming公司的一款游戏兼容层配置工具。 Linux-Gaming PortProtonQt 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe之前版本存在授权问题漏洞，该漏洞源于授权问题，可能导致任何用户挂载和卸载任意文件系统并通过NetworkManager修改网络配置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux-Gaming PortProtonQt 0 ~ 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe -

II. Public POCs for CVE-2026-59678

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III. Intelligence Information for CVE-2026-59678

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Vendor Advisories for CVE-2026-59678 (1)

IV. Related Vulnerabilities

Same weakness: CWE-863

V. Comments for CVE-2026-59678

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