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NVD / CVE Program· CNA Linux

CVE-2026-68294: net: qrtr: restrict socket creation to the initial network namespace

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2d22b94a154ccb9755dddfff802fe3e2b1adbab5, 3b536db8fb32da9e9c62f2bb45e2e319331f0426, 4b95e1f0d6e6342c427cb341ee18a894b146b789; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2d22b94a154ccb9755dddfff802fe3e2b1adbab5, 3b536db8fb32da9e9c62f2bb45e2e319331f0426, 4b95e1f0d6e6342c427cb341ee18a894b146b789; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 4th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.7affected
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 7814f6a3415cad38aa8d6dfc573df778260d66aaaffected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 2d22b94a154ccb9755dddfff802fe3e2b1adbab5affected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 8d351fe0654a20c9f95a61b05d24ebe6d4be3fbbaffected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 4b95e1f0d6e6342c427cb341ee18a894b146b789affected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before f488116df769bdaf89c93371350e49e12133e70faffected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 8150c48fb978e01689f94ed80148f8a7499ae571affected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 659b9b4f194bb56b9903cc95e786ef1d438baa7daffected · git
    • bdabad3e363d825ddf9679dd431cca0b2c30f881 and later · before 3b536db8fb32da9e9c62f2bb45e2e319331f0426affected · git
    • before 4.7not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernelbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64kbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debugbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-debug-modules-extrabefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-64k-modules-extrabefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-cross-headersbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debugbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-develbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-devel-matchedbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-modulesbefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2
AlmaLinux:10kernel-debug-modules-corebefore 6.12.0-211.56.1.el10_26.12.0-211.56.1.el10_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68291Aug 10, 2026 · idpf: fix max_vport related crash on allocation error during init
    0Monitor
  • ← EarlierCVE-2026-68293Aug 10, 2026 · net/mlx5: Fix MCIA register buffer overflow on 32 dword reads
    28Monitor
  • Later →CVE-2026-68295Aug 10, 2026 · LoongArch: BPF: Zero-extend signed ALU32 div/mod results
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2d22b94a154ccb9755dddfff802fe3e2b1adbab5Vendor (CNA)
Linux Linux3b536db8fb32da9e9c62f2bb45e2e319331f0426Vendor (CNA)
Linux Linux4b95e1f0d6e6342c427cb341ee18a894b146b789Vendor (CNA)
Linux Linux659b9b4f194bb56b9903cc95e786ef1d438baa7dVendor (CNA)
Linux Linux7814f6a3415cad38aa8d6dfc573df778260d66aaVendor (CNA)
Linux Linux8150c48fb978e01689f94ed80148f8a7499ae571Vendor (CNA)
Linux Linux8d351fe0654a20c9f95a61b05d24ebe6d4be3fbbVendor (CNA)
Linux Linuxf488116df769bdaf89c93371350e49e12133e70fVendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.48.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.163.1.rt7.504.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-core0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:4.18.0-553.163.1.rt7.504.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)

+7

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-681420 days apartgeneve: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720455 days apartocteontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
    35Monitor
  • CVE-2026-720525 days apartnet: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720545 days apartnet: ip_vti: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720555 days apartnet: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720615 days apartnet: sit: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records