Is there a patch available for CVE-2026-98399?

Yes, a patch is available for CVE-2026-98399. Update the affected software to the latest version immediately.

Linux CVE-2026-98399

EUVD-2026-101048

2026-10-14 Linux

GHSA-wvr7-cc68-fmx4

Information Disclosure Linux

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Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives. 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:

s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block

Unlike kdump, which passes the re-IPL parameter block through os_info, the stand-alone dump passes it through the IPL parm block address and checksum in lowcore.

Some IPL types, like HMC FTP boot or QEMU direct kernel boot, might not provide an IPL parameter block. In this case reipl_type_init() selects IPL_TYPE_UNKNOWN and reipl_block_actual remains NULL. Nevertheless, dump_reipl_run() unconditionally dereferences it when preparing the lowcore fields. This may happen to work by chance when address zero contains readable lowcore data. A zero IPL parameter block address is then stored in lowcore, causing the stand-alone dumper to enter disabled wait after completing the dump.

Explicitly store a zero IPL parameter block address and checksum when no re-IPL parameter block is available. This does not change the behavior: the stand-alone dumper completes the dump and halts, while valid re-IPL parameter blocks continue to be handled as before.

Affected VersionsENISA

Linux patch: 6.12.111

Linux patch: 0

Linux 099b765139929efdcf232f8870804accf8c4cdc5 <37f61b71cbc0caefc01022a19ee56fc2510e2e6e

Linux 099b765139929efdcf232f8870804accf8c4cdc5 <41647864e62b28388ecccc23a82f0e0a091f4ef2

Linux 2.6.30

Linux patch: 6.18.53

Linux patch: 7.3-rc2

Linux 099b765139929efdcf232f8870804accf8c4cdc5 <aed56fa3108b7095e6a048e134981506c056a6cb

Linux 099b765139929efdcf232f8870804accf8c4cdc5 <8d7988e8116c3d29d9e02ca9d37ee84577643f2d

Linux 099b765139929efdcf232f8870804accf8c4cdc5 <280ff19853440d59e031cd8fe161e81305721262

Linux patch: 6.6.158

Linux patch: 7.2.7

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 14, 2026 - 15:03 EUVD

CVE Published

Oct 14, 2026 - 13:26 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 90% exploitable

Data Quality

2 sources

Confidence: Low

EUVD

CVE.org

EPSS

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.