Is there a patch available for EUVD-2026-103613?

Yes, a patch is available for EUVD-2026-103613. Update the affected software to the latest version immediately.

Linux EUVD-2026-103613

| CVE-2026-98568

2026-10-18 Linux

GHSA-489c-q3cc-mm5r

Information Disclosure Linux

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Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

vxlan: use one headroom snapshot for neighbour replies

vxlan_na_create() samples LL_RESERVED_SPACE() to size the reply skb and then samples it again to reserve headroom. A concurrent vxlan_changelink() can update needed_headroom between the two reads, creating a TOCTOU race. The second value can exceed the allocation and make the Ethernet header write out of bounds.

The race is reproducible on the unpatched kernel. It occurred when vxlan_na_create() generated a neighbour reply while vxlan_changelink() changed the link headroom. KASAN caught a four-byte write two bytes beyond a 704-byte skbuff_small_head allocation.

Snapshot the headroom once and use that value for both allocation and reservation.

Affected VersionsENISA

Linux 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <45a67662bf8ce3aa5643accf98d328dfbb47eaf6

Linux patch: 6.18.55

Linux 3927dace523706cc00f808520eaf2125dd7c07b5

Linux 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <315d42ca39f69846662961c25dcf2bb07c350d14

Linux patch: 7.3-rc5

Linux 3.13.10 <3.14

Linux 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <481506a756dcd828ef42391cb08f38d8d96d38fc

Linux 3.14

Linux patch: 6.12.112

Linux d8be18c52dbc94989f6d74637b731af39cd3d902

Linux patch: 7.2.9

Linux 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <ff022fd9d0f0282c575e11778b96bd1b637503eb

Linux 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <a3c5eb6e382dd426a5e7eb08608897ed57167ff7

Linux patch: 0

Linux patch: 6.6.158

Linux 3.12.18 <3.13

Affected Packages

euvd linux fix: 3.13, 3.14

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Oct 18, 2026 - 16:02 EUVD

CVE Published

Oct 18, 2026 - 15:18 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 91% exploitable

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.