CVE-2026-68294

Cross-namespace messaging via unrestricted QRTR socket creation

Published Aug 10, 2026 · Updated Aug 10, 2026

Improper isolation in affected Linux kernels allows local users to send QRTR datagrams across network-namespace boundaries. qrtr_create permits AF_QIPCRTR sockets outside init_net, while qrtr_port_lookup and qrtr_local_enqueue use global port and node state without a namespace check. An unprivileged process able to create user and network namespaces can inject data and control-plane messages into another namespace as node 1.

CVSS severity8.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper isolation in affected Linux kernels allows local users to send QRTR datagrams across network-namespace boundaries. qrtr_create permits AF_QIPCRTR sockets outside init_net, while qrtr_port_lookup and qrtr_local_enqueue use global port and node state without a namespace check. An unprivileged process able to create user and network namespaces can inject data and control-plane messages into another namespace as node 1.

The record

CVE
CVE-2026-68294
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-653
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.7
  2. Affected versionversion=bdabad3e363d825ddf9679dd431cca0b2c30f881 <3b536db8fb32da9e9c62f2bb45e2e319331f0426
  3. Affected versionversion=bdabad3e363d825ddf9679dd431cca0b2c30f881 <4b95e1f0d6e6342c427cb341ee18a894b146b789
  4. Affected versionversion=bdabad3e363d825ddf9679dd431cca0b2c30f881 <659b9b4f194bb56b9903cc95e786ef1d438baa7d
  5. Affected versionversion=bdabad3e363d825ddf9679dd431cca0b2c30f881 <8150c48fb978e01689f94ed80148f8a7499ae571
  6. Affected versionversion=bdabad3e363d825ddf9679dd431cca0b2c30f881 <f488116df769bdaf89c93371350e49e12133e70f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.7; version=bdabad3e363d825ddf9679dd431cca0b2c30f881 <3b536db8fb32da9e9c62f2bb45e2e319331f0426; version=bdabad3e363d825ddf9679dd431cca0b2c30f881 <4b95e1f0d6e6342c427cb341ee18a894b146b789; version=bdabad3e363d825ddf9679dd431cca0b2c30f881 <659b9b4f194bb56b9903cc95e786ef1d438baa7d; version=bdabad3e363d825ddf9679dd431cca0b2c30f881 <8150c48fb978e01689f94ed80148f8a7499ae571; version=bdabad3e363d825ddf9679dd431cca0b2c30f881 <f488116df769bdaf89c93371350e49e12133e70f

Published CVSS scores

8.8cve.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.3Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-653Improper Isolation or Compartmentalization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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