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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98569: ip_gre: Reject enabling collect metadata through changelink

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 1dc759571f3df14891175fc52527f7624ba01322, 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c, 63c5e48d6f7f5722a48f63e13e961dc5302894ed; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1dc759571f3df14891175fc52527f7624ba01322, 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c, 63c5e48d6f7f5722a48f63e13e961dc5302894ed; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1 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: ip_gre: Reject enabling collect metadata through changelink ipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP or ERSPAN device. Unlike newlink, changelink does not enforce metadata tunnel uniqueness. Converting a non-metadata device can therefore replace the metadata receive entry for another device of the same type in the same netns. Deleting either device then clears the shared entry, breaking metadata receive lookup for the surviving device. If parameter validation fails after collect_md is set, deleting the modified device can also clear an entry it never owned. Reject enabling metadata mode in both changelink callbacks before any encapsulation or tunnel parameters are modified. Allow requests that repeat the metadata attribute on an existing metadata device.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

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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

    • 4.3affected
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before c80315da84998b69b8829785a174b0bf72a81992affected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before cff8b520312e750ad38967c30128e1534cbf9484affected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before 1dc759571f3df14891175fc52527f7624ba01322affected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before da2e0cfbb620b199927a1e5b93b7cfde32083c7daffected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before 2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5caffected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before bdd41b96e814300c66222cf4e47ecb8aef995656affected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before 63c5e48d6f7f5722a48f63e13e961dc5302894edaffected · git
    • 2e15ea390e6f4466655066d97e22ec66870a042c and later · before a3f315be9d30eeb6938d11fa17fd4b32d52f7c42affected · git
    • before 4.3not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.9-17.2.9-1

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-2026-98567Oct 18, 2026 · net: xps: reject an out of range traffic class
    0Monitor
  • ← EarlierCVE-2026-98568Oct 18, 2026 · vxlan: use one headroom snapshot for neighbour replies
    0Monitor
  • Later →CVE-2026-98570Oct 18, 2026 · net: ipv6: keep room for the mac header in dst_dev_overhead()
    0Monitor

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 Linux1dc759571f3df14891175fc52527f7624ba01322Vendor (CNA)
Linux Linux2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5cVendor (CNA)
Linux Linux63c5e48d6f7f5722a48f63e13e961dc5302894edVendor (CNA)
Linux Linuxa3f315be9d30eeb6938d11fa17fd4b32d52f7c42Vendor (CNA)
Linux Linuxbdd41b96e814300c66222cf4e47ecb8aef995656Vendor (CNA)
Linux Linuxc80315da84998b69b8829785a174b0bf72a81992Vendor (CNA)
Linux Linuxcff8b520312e750ad38967c30128e1534cbf9484Vendor (CNA)
Linux Linuxda2e0cfbb620b199927a1e5b93b7cfde32083c7dVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.159.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.113-1~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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+18 d
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).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. Exploit maturity— → 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