Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-72051: net: ip6_tunnel: 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: 0.15% (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 234cd54fc500f69db43e37de38603da617fbbeea, 2496fa0b7d180b3ad356b514e7ff93bb14e6140a, 2636d061bc237a2446a146e42dcc6563acfa7432.

Low priority for now. Upgrade to Linux Linux 234cd54fc500f69db43e37de38603da617fbbeea, 2496fa0b7d180b3ad356b514e7ff93bb14e6140a, 2636d061bc237a2446a146e42dcc6563acfa7432 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_tunnel: require CAP_NET_ADMIN in the device netns for changelink ip6_tnl_changelink() operates 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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 15, 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.

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.

Follow CVE-2026-72051

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • 3.12affected
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 2d53ee7daabe733deb81f51d2cc90188f8ad59a1affected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 82e53e7281c71e174f9f5877c566a623c637b406affected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 5252db8fb604321133138c7069d6fc3fcd89cdeeaffected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 2636d061bc237a2446a146e42dcc6563acfa7432affected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 7f68f7928484f463a5bc0d50e6fdd8d16f55a5aaaffected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 234cd54fc500f69db43e37de38603da617fbbeeaaffected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before d4bcc202a3530c856e1cb183384bc9cc8fddab22affected · git
    • 0bd8762824e73a3cce7b7560a97463301764b616 and later · before 2496fa0b7d180b3ad356b514e7ff93bb14e6140aaffected · git
    • before 3.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.5-17.1.5-1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-64kbbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-docsbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-obs-buildbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSkernel-symsbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise Live Patching 15 SP4kernel-livepatch-SLE15-SP4_Update_60before 1-150400.9.3.11-150400.9.3.1
SUSE:Linux Enterprise Micro 5.3kernel-defaultbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise Micro 5.3kernel-default-basebefore 5.14.21-150400.24.243.1.150400.24.122.15.14.21-150400.24.243.1.150400.24.122.1
SUSE:Linux Enterprise Micro 5.3kernel-rtbefore 5.14.21-150400.15.189.15.14.21-150400.15.189.1
SUSE:Linux Enterprise Micro 5.3kernel-sourcebefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1
SUSE:Linux Enterprise Micro 5.3kernel-source-rtbefore 5.14.21-150400.15.189.15.14.21-150400.15.189.1
SUSE:Linux Enterprise Server 15 SP4-LTSSkernel-zfcpdumpbefore 5.14.21-150400.24.243.15.14.21-150400.24.243.1

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-2026-72045Aug 15, 2026 · octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
    35Monitor
  • ← EarlierCVE-2026-72049Aug 15, 2026 · ieee802154: admin-gate legacy LLSEC dump operations
    28Monitor
  • Later →CVE-2026-72052Aug 15, 2026 · net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor

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 Linux234cd54fc500f69db43e37de38603da617fbbeeaVendor (CNA)
Linux Linux2496fa0b7d180b3ad356b514e7ff93bb14e6140aVendor (CNA)
Linux Linux2636d061bc237a2446a146e42dcc6563acfa7432Vendor (CNA)
Linux Linux2d53ee7daabe733deb81f51d2cc90188f8ad59a1Vendor (CNA)
Linux Linux5252db8fb604321133138c7069d6fc3fcd89cdeeVendor (CNA)
Linux Linux7f68f7928484f463a5bc0d50e6fdd8d16f55a5aaVendor (CNA)
Linux Linux82e53e7281c71e174f9f5877c566a623c637b406Vendor (CNA)
Linux Linuxd4bcc202a3530c856e1cb183384bc9cc8fddab22Vendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.14.21-150400.24.243.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-default5.14.21-150400.24.243.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-default-base5.14.21-150400.24.243.1.150400.24.122.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-docs5.14.21-150400.24.243.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP4_Update_601-150400.9.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-obs-build5.14.21-150400.24.243.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-rt5.14.21-150400.15.189.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-source5.14.21-150400.24.243.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-source-rt5.14.21-150400.15.189.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-syms5.14.21-150400.24.243.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-zfcpdump5.14.21-150400.24.243.1 · SUSE:Linux Enterprise Server 15 SP4-LTSSPackage registry (OSV)

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-2026-720450 days apartocteontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
    35Monitor
  • CVE-2026-720520 days apartnet: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720530 days apartnet: ipip: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720540 days apartnet: ip_vti: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720550 days apartnet: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
    35Monitor
  • CVE-2026-720610 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).

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