Is there a patch available for CVE-2026-98403?

Yes, a patch is available for CVE-2026-98403. Update the affected software to the latest version immediately.

Linux CVE-2026-98403

EUVD-2026-101052

2026-10-14 Linux

GHSA-7qjr-375p-687v

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/boot: Avoid IPL parameter append past command line

A command line may occupy all but the terminating byte of COMMAND_LINE_SIZE. In that case append_ipl_block_parm() passes a zero size to the IPL parameter conversion helpers and points the destination one byte past early_command_line. The helpers subtract one from the unsigned size and write the converted parameter outside the command line buffer.

Convert the IPL parameter in the command line parsing buffer first. A parameter beginning with '=' can then replace the existing command line regardless of its length, while other parameters are appended only when space remains.

Affected VersionsENISA

Linux 5ecb2da660ab8eddafe059a6a8a708465db89ca2 <8d11bfec8666f8409fac9072e9c25b691d3e30ac

Linux patch: 0

Linux patch: 6.12.112

Linux 5ecb2da660ab8eddafe059a6a8a708465db89ca2 <af9866021a00ab9eeacf0c33ee73f3d134b4ed70

Linux 5ecb2da660ab8eddafe059a6a8a708465db89ca2 <73eec5a0d55916d7e1115f5d03a7ffc06d6215cf

Linux 5.16

Linux patch: 7.3-rc2

Linux patch: 7.2.7

Linux patch: 6.18.53

Linux 5ecb2da660ab8eddafe059a6a8a708465db89ca2 <d76181dfabdaa720703167393704efacba343442

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.