Is there a patch available for EUVD-2026-86933?

Yes, a patch is available for EUVD-2026-86933. Update the affected software to the latest version immediately.

Linux EUVD-2026-86933

| CVE-2026-98102

2026-09-25 Linux

GHSA-g228-xhf6-wqq6

Information Disclosure Linux

View

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:

ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()

When removing a source filter whose count reaches zero, ip6_mc_del1_src() unlinks psf from pmc->mca_sources. If the filter was previously active, the code moved psf directly into pmc->mca_tomb by updating psf->sf_next.

Because pmc->mca_sources is traversed locklessly under RCU (e.g. by ipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period elapses diverts concurrent readers to the tombstone list. Consequently, readers miss remaining active sources in pmc->mca_sources and improperly examine deleted tombstone entries.

Fix this by allocating a new tombstone node for pmc->mca_tomb (as done in sf_setstate()) and retiring the original psf via kfree_rcu().

Affected VersionsENISA

Linux 5.13

Linux patch: 7.3-rc2

Linux 4b200e398953c237c86d32bf26d4cb2a96556a6f <93b49239840b91313adbd77b8b52993eff2d08c1

Linux patch: 6.18.53

Linux patch: 6.12.111

Linux patch: 0

Linux 4b200e398953c237c86d32bf26d4cb2a96556a6f <8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4

Linux 4b200e398953c237c86d32bf26d4cb2a96556a6f <4352737297b262e8367675c19a7dc6a9f53c97af

Linux 5.10.261 <5.11

Linux 86c49119f0353f857cc08030ec9e4ebaab3d5a64

Linux 4b200e398953c237c86d32bf26d4cb2a96556a6f <5149c60c406595b56fda0c6e9aae7fd287f636aa

Linux patch: 7.2.7

Affected Packages

euvd linux fix: 5.11

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 - 12:02 EUVD

CVE Published

Sep 25, 2026 - 10:35 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 95% 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.