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CVE-2026-72052· NVD / CVE Program· CNA Linux

net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink

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: 0.16% (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 03d8843b143ebbbfaf48511922abc6e886575a61, 0caa9f348f8b5356900de77b0bb89a697c4aff20, 129f8939e5af683cec3a1a5edcb40a64636ad81e.

Low priority for now. Upgrade to Linux Linux 03d8843b143ebbbfaf48511922abc6e886575a61, 0caa9f348f8b5356900de77b0bb89a697c4aff20, 129f8939e5af683cec3a1a5edcb40a64636ad81e 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: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate both ops on rtnl_dev_link_net_capable() at their top, before any attribute is parsed.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 5th percentile
CWE
—

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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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

    • d0201d2405dac8d9b16773e97709925e397552d0, 7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a, 5.5affected
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before 129f8939e5af683cec3a1a5edcb40a64636ad81eaffected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before e3724dedf57761c6de52f4d604ec74f66fd61611affected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before 220162c9fedbe992da70d70f50a10da4f45f914caffected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before 1d4d8ee002083ca4ead5353662bf8362428af57faffected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before 0caa9f348f8b5356900de77b0bb89a697c4aff20affected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before 03d8843b143ebbbfaf48511922abc6e886575a61affected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before c38c8b0db3c65b597e7ece317b6cb59de3d15e69affected · git
    • 690afc165bb314354667f67157c1a1aea7dc797a and later · before f00a50876d2818bd6dc86fa98b3ef360884c53c8affected · git
    • 4.19.100 and later · before 4.20affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.171.1.el8_104.18.0-553.171.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.171.1.rt7.512.el8_104.18.0-553.171.1.rt7.512.el8_10

+76

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
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-72421ipv4: fib: Don't ignore error route in local/main tables.
    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan

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 Linux03d8843b143ebbbfaf48511922abc6e886575a61Vendor (CNA)
Linux Linux0caa9f348f8b5356900de77b0bb89a697c4aff20Vendor (CNA)
Linux Linux129f8939e5af683cec3a1a5edcb40a64636ad81eVendor (CNA)
Linux Linux1d4d8ee002083ca4ead5353662bf8362428af57fVendor (CNA)
Linux Linux220162c9fedbe992da70d70f50a10da4f45f914cVendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linuxc38c8b0db3c65b597e7ece317b6cb59de3d15e69Vendor (CNA)
Linux Linuxe3724dedf57761c6de52f4d604ec74f66fd61611Vendor (CNA)
Linux Linuxf00a50876d2818bd6dc86fa98b3ef360884c53c8Vendor (CNA)
almalinux:bpftool4.18.0-553.171.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.171.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.171.1.rt7.512.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-core0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:4.18.0-553.171.1.rt7.512.el8_10 · Red Hat:enterprise_linux:8::nfvPackage registry (OSV)

+18

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.

No nightly-computed relations.

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).

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)

—

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

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