Is there a patch available for CVE-2026-98559?

Yes, a patch is available for CVE-2026-98559. Update the affected software to the latest version immediately.

Linux CVE-2026-98559

EUVD-2026-103604

2026-10-18 Linux

GHSA-4x5q-83g5-68jv

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:

net/smc: fix UAF on lgr list traversal in smcr_port_err()

smcr_port_err() traverses smc_lgr_list.list without holding smc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched() to free an lgr while it is still being dereferenced.

Hold smc_lgr_list.lock across the traversal. Update smc_ib_gid_check() to call smcr_port_err() after releasing the lock.

Affected VersionsENISA

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <a9b968e42690d784c241a0761c10253271f7df5d

Linux patch: 5.15.222

Linux patch: 6.1.189

Linux patch: 7.2.9

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <00a59600ae72d24859d0ad1783a78bc921bc2599

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <3d65a2eb4449fc9658fb860dea893025d028d90e

Linux patch: 6.18.55

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <0edcc4284392b28826b5d37532b366b291e6e0fa

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <34bcf11cd2528ae00bb6d764d808083c66824277

Linux patch: 0

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <3d35f069e1c119992000d51236dbe54da2d4e61e

Linux 5.8

Linux 541afa10c126b6c22c2a805a559c70cc41fd156e <61cb282fe97b3b0ba32ca09417a693162bf4ae3f

Linux patch: 7.3-rc5

Linux patch: 6.12.112

Linux patch: 6.6.158

Affected Packages

euvd linux no fix

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 90% 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.