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8.8
HIGH CVSS 3.1
CVE-2026-68294
net: qrtr: restrict socket creation to the initial network namespace
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: restrict socket creation to the initial network namespace QRTR keeps its entire port and node state in module-global variables that are not partitioned per network namespace: qrtr_local_nid is a single global node id (always 1) and qrtr_ports is a single global xarray. qrtr_port_lookup() and qrtr_local_enqueue() operate on that global state with no network-namespace check, and qrtr_create() places no restriction on the namespace a socket is created in. As a result an unprivileged process that creates an AF_QIPCRTR socket in a separate network namespace, e.g. via unshare(CLONE_NEWUSER | CLONE_NEWNET), can send QRTR datagrams - including control-plane messages such as QRTR_TYPE_NEW_SERVER - to QRTR sockets owned by another namespace, and vice versa. The receiving socket sees such a message as coming from node id 1, indistinguishable from a legitimate local client, breaking the isolation that network namespaces are expected to provide. QRTR is a transport to global hardware endpoints (the modem and other remote processors) and has no per-namespace semantics; its in-kernel name service already creates its socket in init_net only. Confine the socket family to the initial network namespace, as other non-namespace-aware socket families do (see llc_ui_create() and the ieee802154 socket code).

Details
INFO

Published Date :

Aug. 10, 2026, 1:20 p.m.

Last Modified :

Aug. 17, 2026, 5:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-68294 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Restrict QRTR socket creation to the initial network namespace to prevent cross-namespace communication.
  • Update the Linux kernel to a version where this issue is resolved.
  • Ensure QRTR socket creation is confined to the initial network namespace.
  • Verify network namespace isolation is maintained after the update.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-68294.

URL Resource
https://git.kernel.org/stable/c/3b536db8fb32da9e9c62f2bb45e2e319331f0426
https://git.kernel.org/stable/c/4b95e1f0d6e6342c427cb341ee18a894b146b789
https://git.kernel.org/stable/c/659b9b4f194bb56b9903cc95e786ef1d438baa7d
https://git.kernel.org/stable/c/8150c48fb978e01689f94ed80148f8a7499ae571
https://git.kernel.org/stable/c/f488116df769bdaf89c93371350e49e12133e70f
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-68294 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-68294 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-68294 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-68294 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '4b95e1f0d6e6342c427cb341ee18a894b146b789', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': 'f488116df769bdaf89c93371350e49e12133e70f', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '8150c48fb978e01689f94ed80148f8a7499ae571', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '659b9b4f194bb56b9903cc95e786ef1d438baa7d', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '3b536db8fb32da9e9c62f2bb45e2e319331f0426', 'versionType': 'git'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '4b95e1f0d6e6342c427cb341ee18a894b146b789', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': 'f488116df769bdaf89c93371350e49e12133e70f', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '8150c48fb978e01689f94ed80148f8a7499ae571', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '659b9b4f194bb56b9903cc95e786ef1d438baa7d', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '3b536db8fb32da9e9c62f2bb45e2e319331f0426', 'versionType': 'git'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 13, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 10, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '4b95e1f0d6e6342c427cb341ee18a894b146b789', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': 'f488116df769bdaf89c93371350e49e12133e70f', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '8150c48fb978e01689f94ed80148f8a7499ae571', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '659b9b4f194bb56b9903cc95e786ef1d438baa7d', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdabad3e363d825ddf9679dd431cca0b2c30f881', 'lessThan': '3b536db8fb32da9e9c62f2bb45e2e319331f0426', 'versionType': 'git'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.7', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/qrtr/af_qrtr.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: net: qrtr: restrict socket creation to the initial network namespace QRTR keeps its entire port and node state in module-global variables that are not partitioned per network namespace: qrtr_local_nid is a single global node id (always 1) and qrtr_ports is a single global xarray. qrtr_port_lookup() and qrtr_local_enqueue() operate on that global state with no network-namespace check, and qrtr_create() places no restriction on the namespace a socket is created in. As a result an unprivileged process that creates an AF_QIPCRTR socket in a separate network namespace, e.g. via unshare(CLONE_NEWUSER | CLONE_NEWNET), can send QRTR datagrams - including control-plane messages such as QRTR_TYPE_NEW_SERVER - to QRTR sockets owned by another namespace, and vice versa. The receiving socket sees such a message as coming from node id 1, indistinguishable from a legitimate local client, breaking the isolation that network namespaces are expected to provide. QRTR is a transport to global hardware endpoints (the modem and other remote processors) and has no per-namespace semantics; its in-kernel name service already creates its socket in init_net only. Confine the socket family to the initial network namespace, as other non-namespace-aware socket families do (see llc_ui_create() and the ieee802154 socket code).
    Added Reference https://git.kernel.org/stable/c/3b536db8fb32da9e9c62f2bb45e2e319331f0426
    Added Reference https://git.kernel.org/stable/c/4b95e1f0d6e6342c427cb341ee18a894b146b789
    Added Reference https://git.kernel.org/stable/c/659b9b4f194bb56b9903cc95e786ef1d438baa7d
    Added Reference https://git.kernel.org/stable/c/8150c48fb978e01689f94ed80148f8a7499ae571
    Added Reference https://git.kernel.org/stable/c/f488116df769bdaf89c93371350e49e12133e70f
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact