Skip to content
Noroxi
CVE-2026-68142· NVD / CVE Program· CNA Linux

geneve: 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: 0.12% (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 11a7d989d00160481a273eb4f7f05f64b5a6ffdf, 278c6a31ee27c931c722202c8c06cc3253923254, 2abdacc927c92fa6a9cc8341e8c9b88dcb561553; 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 11a7d989d00160481a273eb4f7f05f64b5a6ffdf, 278c6a31ee27c931c722202c8c06cc3253923254, 2abdacc927c92fa6a9cc8341e8c9b88dcb561553; 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: geneve: require CAP_NET_ADMIN in the device netns for changelink A tunnel changelink() operates on at most two netns, dev_net(dev) and the sticky underlay netns geneve->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 geneve->net can rewrite a geneve device whose underlay lives in geneve->net. geneve_changelink() applies the new configuration against geneve->net: geneve_link_config() and the geneve_quiesce()/geneve_unquiesce() pair reopen the underlay sockets in that netns (geneve_sock_add() uses geneve->net), so the same reasoning as the tunnel changelink series applies here. Gate geneve_changelink() with rtnl_dev_link_net_capable(), at the top of the op before any attribute is parsed, matching ipgre_changelink() and the rest of the "require CAP_NET_ADMIN in the device netns for changelink" series. Found by 0sec automated security-research tooling (https://0sec.ai).

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 1th 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-2026-68142

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

    • 4.14affected
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before a5522963c57f12df5f9db804ebfc472b58eef0aeaffected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 278c6a31ee27c931c722202c8c06cc3253923254affected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 11a7d989d00160481a273eb4f7f05f64b5a6ffdfaffected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 2abdacc927c92fa6a9cc8341e8c9b88dcb561553affected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 9de5518fc1fab583526a8f66b8e505c4864dc60aaffected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before f8c498585d2a08aa623748353c3e61467b7e9fd2affected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 95f45e20f1b2cec13823f0f68060ab4b2261b2c1affected · git
    • 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a and later · before 8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01affected · git
    • before 4.14not 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 7.1.6-17.1.6-1

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-2026-68140Aug 10, 2026 · net/iucv: fix use-after-free of a severed iucv_path
    35Monitor
  • ← EarlierCVE-2026-68141Aug 10, 2026 · net/af_iucv: fix NULL deref in afiucv_hs_callback_syn()
    30Monitor
  • Later →CVE-2026-68143Aug 10, 2026 · net: slip: serialize receive against buffer reallocation
    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 Linux11a7d989d00160481a273eb4f7f05f64b5a6ffdfVendor (CNA)
Linux Linux278c6a31ee27c931c722202c8c06cc3253923254Vendor (CNA)
Linux Linux2abdacc927c92fa6a9cc8341e8c9b88dcb561553Vendor (CNA)
Linux Linux8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01Vendor (CNA)
Linux Linux95f45e20f1b2cec13823f0f68060ab4b2261b2c1Vendor (CNA)
Linux Linux9de5518fc1fab583526a8f66b8e505c4864dc60aVendor (CNA)
Linux Linuxa5522963c57f12df5f9db804ebfc472b58eef0aeVendor (CNA)
Linux Linuxf8c498585d2a08aa623748353c3e61467b7e9fd2Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package 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-2026-682940 days apartnet: qrtr: restrict socket creation to the initial network namespace
    35Monitor
  • CVE-2026-720455 days apartocteontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF
    35Monitor
  • CVE-2026-720535 days apartnet: ipip: 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