VulnerabilityPublished 18 Oct 2026

CVE-2026-98604: Linux kernel · ovpn: replace bind when learning local endpoint

Source GCVE Database

Authoritative record:CVE-2026-98604· Medium

Not known to be exploited · fixed in e283009151d3d131447c2edda500199c5fda5f72 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e283009151d3d131447c2edda500199c5fda5f72, aea934a221ec6a867221e5b765f65f1857befd53, 21dbc9f4d0bdd3b22f91beabc7840064bf11594f

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-hmmp-5rq5-qfff

What to do

Upgrade Linux kernel to e283009151d3d131447c2edda500199c5fda5f72, aea934a221ec6a867221e5b765f65f1857befd53 or 21dbc9f4d0bdd3b22f91beabc7840064bf11594f.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f0281c1d3732d1ec084fa1e06d1767d33e1a570e, < e283009151d3d131447c2edda500199c5fda5f72	Fixed in e283009151d3d131447c2edda500199c5fda5f72
LinuxLinux	Affected ≥ f0281c1d3732d1ec084fa1e06d1767d33e1a570e, < aea934a221ec6a867221e5b765f65f1857befd53	Fixed in aea934a221ec6a867221e5b765f65f1857befd53
LinuxLinux	Affected ≥ f0281c1d3732d1ec084fa1e06d1767d33e1a570e, < 21dbc9f4d0bdd3b22f91beabc7840064bf11594f	Fixed in 21dbc9f4d0bdd3b22f91beabc7840064bf11594f
LinuxLinux	Affected =6.16	Fixed in–
Red Hatredhat/kernel`pkg:rpm/redhat/kernel`Other threats	Affected =6.16	Fixed in–

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 ovpn module that replaces the bind structure when learning a new local endpoint, ensuring safe concurrent access. Users should update to the patched kernel version containing this fix. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's ovpn module related to local endpoint learning has been resolved. The issue involved unsafe in-place updates to the local endpoint bind structure, leading to potential torn reads of IPv6 addresses during concurrent updates. The fix replaces the bind structure when learning a new local endpoint to ensure safe publication and synchronization.

References

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