VulnerabilityPublished 18 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98569· Medium

Not known to be exploited · fixed in da2e0cfbb620b199927a1e5b93b7cfde32083c7d : update Linux kernel when convenient.

Data as of 26 Oct 2026, 16:00 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in da2e0cfbb620b199927a1e5b93b7cfde32083c7d, cff8b520312e750ad38967c30128e1534cbf9484, c80315da84998b69b8829785a174b0bf72a81992 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-hr5p-wrg7-45pp

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < da2e0cfbb620b199927a1e5b93b7cfde32083c7d	Fixed in da2e0cfbb620b199927a1e5b93b7cfde32083c7d
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < cff8b520312e750ad38967c30128e1534cbf9484	Fixed in cff8b520312e750ad38967c30128e1534cbf9484
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < c80315da84998b69b8829785a174b0bf72a81992	Fixed in c80315da84998b69b8829785a174b0bf72a81992
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < bdd41b96e814300c66222cf4e47ecb8aef995656	Fixed in bdd41b96e814300c66222cf4e47ecb8aef995656
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < a3f315be9d30eeb6938d11fa17fd4b32d52f7c42	Fixed in a3f315be9d30eeb6938d11fa17fd4b32d52f7c42
LinuxLinux	Affected ≥ 2e15ea390e6f4466655066d97e22ec66870a042c, < 63c5e48d6f7f5722a48f63e13e961dc5302894ed	Fixed in 63c5e48d6f7f5722a48f63e13e961dc5302894ed

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix has been implemented in the Linux kernel to reject enabling metadata mode through changelink callbacks before modifying tunnel parameters. Users should update to a Linux kernel version that includes this fix. Patch status is not explicitly confirmed in the provided data; users should consult the official Linux kernel advisories or vendor updates for the exact fixed versions and apply the official patches accordingly.

Description

A vulnerability in the Linux kernel's ip_gre module allowed enabling metadata collection on existing GRE, GRETAP, or ERSPAN devices through the changelink interface without enforcing metadata tunnel uniqueness. This could cause metadata receive entries to be overwritten or cleared improperly, breaking metadata lookup for surviving devices. The issue has been resolved by rejecting metadata mode enabling in changelink callbacks before modifying tunnel parameters.

References

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