Is there a patch available for CVE-2026-98347?

Yes, a patch is available for CVE-2026-98347. Update the affected software to the latest version immediately.

Linux CVE-2026-98347

EUVD-2026-93332

2026-10-06 Linux

GHSA-8j4r-887v-cjjx

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:

IB/IPoIB: Avoid restoring OPER_UP after multicast flush

ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set.

This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down.

Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL.

Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.

Affected VersionsENISA

Linux 344bacca8cd811809fc33a249f2738ab757d327f <188b334a6db36a8e0bfaaf59bc4020639a0f3aad

Linux 4.8

Linux patch: 6.6.158

Linux patch: 6.1.189

Linux 3.16.39 <3.17

Linux patch: 6.18.54

Linux 344bacca8cd811809fc33a249f2738ab757d327f <f973769fb7cb33ba0d4a64b7dcfee0cabaead938

Linux dfe809702a11bd7fb91c882fb55620e39ce22109

Linux 3.2.84 <3.3

Linux 4.7.7 <4.8

Linux patch: 5.15.222

Linux patch: 0

Linux 344bacca8cd811809fc33a249f2738ab757d327f <1b11e4b55b41d9e69a8e8d07622614202e2eaca9

Linux 749fd55dd210f9676f0d445a6efaaa3bec65174a

Linux b81459c78935e4579a577b2366c5f8878d3c7fee

Linux 4.4.24 <4.5

Linux 344bacca8cd811809fc33a249f2738ab757d327f <5ad925d45f28464a5e043c9620880bb6a030da89

Linux 344bacca8cd811809fc33a249f2738ab757d327f <9a141d3dc869d18b2eab35e999f4790a9b84e40f

Linux 344bacca8cd811809fc33a249f2738ab757d327f <1ff3add37c329704ec46181b4ae4f00f9f16ce6f

Linux 344bacca8cd811809fc33a249f2738ab757d327f <326f7d34bd7e64de535566b65c0533b640df5a81

Linux patch: 7.3-rc4

Linux 87160fb51bc343793cc8f5f031a87f1a35aecb82

Linux 3.10.105 <3.11

Linux patch: 5.10.271

Linux 344bacca8cd811809fc33a249f2738ab757d327f <b72f38929f4b5aa83161fd3b22a7327207e51ec5

Linux patch: 6.12.112

Linux 8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5

Linux a289c65ca49d2680a3d797e633e57a45573d1df2

Linux patch: 7.2.8

Linux 3.12.65 <3.13

Affected Packages

euvd linux fix: 3.3, 3.11, 3.13, 3.17, 4.5, 4.8

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 06, 2026 - 10:02 EUVD

CVE Published

Oct 06, 2026 - 08:46 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 93% 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.