Is there a patch available for CVE-2026-98238?

Yes, a patch is available for CVE-2026-98238. Update the affected software to the latest version immediately.

Linux CVE-2026-98238

EUVD-2026-93166

2026-10-06 Linux

GHSA-wwj9-jxr5-39jp

Buffer Overflow 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: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()

The netif index carried in the DPMAIF PIT header is five bits wide, but ccmni_inst[] only has room for NIC_DEV_MAX (21) entries. t7xx_ccmni_recv_skb() indexes the array without a bounds check, so indexes 21 to 31 read past it. The out-of-bounds value lands in the callback table that follows the array, which is never NULL, so the existing !ccmni check does not catch it and the driver dereferences whatever sits there as a struct t7xx_ccmni.

Drop the skb when the index is out of range.

Verified in a QEMU guest with a fault injector setting the netif index to 25: the unpatched driver reads a value past ccmni_inst[], which lands in the callback table, and dereferences it far enough to queue the skb. With this check the packet is dropped. Well-formed traffic on index 0 is unaffected.

Changes in v2: none.

Affected VersionsENISA

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <7c2fe308bda5a7e6222d7f0c3c311991372baab4

Linux patch: 6.1.189

Linux patch: 6.18.54

Linux patch: 6.12.112

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <e1b0609b1a40da03e385be290853a604eb4c3fb9

Linux patch: 7.3-rc4

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <fba45070e25abdae08bcaebfadeef050dc39e208

Linux patch: 6.6.158

Linux patch: 7.2.8

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <d28aa2de9654e8024922775520a2665e00c04ad5

Linux 5.19

Linux patch: 0

Linux 05d19bf500f8281f574713479b04679fa226d0a3 <c7ead9704249d57d4693a04697e3bbd285138fa9

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 06, 2026 - 10:02 EUVD

CVE Published

Oct 06, 2026 - 08:45 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 93% exploitable

Threat Intel

1 sources

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS NEWS 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

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.