SB20260812250 - Improper access control in Linux kernel qrtr

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Main Vulnerability Database SB20260812250

SB20260812250 - Improper access control in Linux kernel qrtr

Published: August 12, 2026

Security Bulletin ID SB20260812250
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-68294)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to bypass network namespace isolation.

The vulnerability exists due to improper access control in the AF_QIPCRTR socket creation logic and global QRTR state handling when creating and using QRTR sockets from a separate network namespace. A local user can create an AF_QIPCRTR socket in another network namespace and send crafted QRTR datagrams to sockets owned by a different namespace to bypass network namespace isolation.

The receiving socket may treat the message as originating from node id 1, making it indistinguishable from a legitimate local client.


Remediation

Install update from vendor's website.

References