Is there a patch available for EUVD-2026-86876?

Yes, a patch is available for EUVD-2026-86876. Update the affected software to the latest version immediately.

Linux EUVD-2026-86876

| CVE-2026-97568

2026-09-25 Linux

GHSA-6cg2-hrxf-655w

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:

mptcp: syncookies: remember the request backup flag

Instead of using an uninitialised bit when copying the info in subflow_ulp_clone().

To fix this, no need to extend the join_entry structure: backup is coming from struct mptcp_subflow_request_sock, only one bit. Do the same here by using one bit for both.

Affected VersionsENISA

Linux 6.6.45 <6.7

Linux 73e2baa301ee3f62ff971e68877adeb37f98cc67

Linux 6.1.104 <6.2

Linux patch: 7.3-rc3

Linux 1008f2bcbc8e461c1df3aebba30ac4f616ebe570

Linux 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7

Linux efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <00b2bd518911e0daab00f4749cce68c191ccebb4

Linux patch: 0

Linux 6.11

Linux 5.15.165 <5.16

Linux 6.10.4 <6.11

Linux efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <61178d0b85b4b1b53e78b06e89d018d22d102f88

Linux patch: 6.18.53

Linux efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <b76c0e28b392620dfbaf92cdeedbf115820b44cb

Linux 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7

Linux 09176f80995105c62939728fbad5c437d61e7ff4

Linux patch: 7.2.7

Linux 5.10.224 <5.11

Linux efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <06d649f9cd03a9f8e768a658b20acf8d2c8022e0

Linux patch: 6.12.111

Affected Packages

euvd linux fix: 5.11, 5.16, 6.2, 6.7, 6.11

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

Sep 25, 2026 - 11:02 EUVD

CVE Published

Sep 25, 2026 - 10:21 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

VulDB

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.