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Linux EUVDEUVD-2026-45608

| CVE-2026-64035 CRITICAL
Missing Initialization of Resource (CWE-909)
2026-07-19 Linux GHSA-85cw-fhvw-f94j
Information Disclosure Linux
Critical
Disputed · 9.8 Vendor: Linux
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Vulnerability Assessment

Weakness
CWE
CWE-909
ASVS 5.0
V15 - Secure Coding and Architecture Missing initialization of resource
Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 20, 2026

TX-completion memory mishandling in the Linux kernel's Intel igc (I225/I226 2.5GbE) driver stems from igc_fpe_init_smd_frame() failing to set the tx-buffer type on SMD (Frame Preemption) frames, so a reused igc_tx_buffer can retain a stale XDP or XSK type and be freed through the wrong cleanup path. This affects local systems running an igc NIC with Frame Preemption active, and the realistic impact is memory corruption or a driver crash rather than remote compromise. No public exploit identified at time of analysis; EPSS is very low (0.17%, 6th percentile) and it is not in CISA KEV, despite the NVD-assigned 9.8 CVSS.

Affected VersionsENISA

Linux patch: 6.18.34
Linux 5422570c0010bb968738f9256eb2bf83e79b4d63 <1f83545f432d106d5fc71d3997b2d382104ebcc4
Linux patch: 0
Linux 5422570c0010bb968738f9256eb2bf83e79b4d63 <5acc641e590e008caaed480ed9ffae47cf7ecbdf
Linux patch: 7.0.11
Linux 5422570c0010bb968738f9256eb2bf83e79b4d63 <1c8587bd025244aa52061f5ceecbf5e68a1063d9
Linux 6.16
Linux patch: 7.1

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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Severity by source

Sources disagree (Medium–Critical)
Vendor (Linux) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE CRITICAL
Red Hat 7.0 MEDIUM

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: Linux

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
CVSS changed
Jul 20, 2026 - 15:22 NVD
9.8 (CRITICAL)
Patch available
Jul 19, 2026 - 17:03 EUVD
CVE Published
Jul 19, 2026 - 15:39 cve.org
CRITICAL 9.8
CVE Published
Jul 19, 2026 - 15:39 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

igc: set tx buffer type for SMD frames

Sashiko pointed out that igc_fpe_init_smd_frame() initializes igc_tx_buffer fields for an SMD skb, but does not set the buffer type: https://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp

Since igc_tx_buffer entries are reused, a stale XDP or XSK type can remain and make TX completion use the wrong cleanup path.

Set the buffer type to IGC_TX_BUFFER_TYPE_SKB.

Executive ViewAI

Why It Matters

A CRITICAL vulnerability in Linux kernel's Intel I225/I226 network drivers can cause memory corruption or driver crashes on systems with Frame Preemption active. While a vendor patch is available, actual exploitation risk remains low with no known public exploits or active attacks, making this primarily a system stability and data integrity concern.

Recommended Action

Within 24 hours, inventory Linux systems running Intel igc driver (I225/I226 NICs) with Frame Preemption enabled and assess Frame Preemption deployment scope. Within 7 days, apply the available kernel patch to all affected systems through standard change management. Within 30 days, complete patch rollout across the environment, validate driver stability post-deployment, and document Frame Preemption configuration for future system hardening.

Business Impact: Medium
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.2%
Top 94% exploitable
Data Quality
6 sources
Confidence: High
EUVD 🇯🇵JVN NVD CVE.org EPSS Vendor 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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
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.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Medium

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Same weakness CWE-909 – Missing Initialization of Resource

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CVE-2025-68613 HIGH POC
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CVE-2015-1701 HIGH POC
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CVE-2017-0147 HIGH POC
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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-64035 ADVISORY https://seclists.org/oss-sec/2026/q3/230 ADVISORY https://ubuntu.com/security/notices/USN-8593-1 ADVISORY https://vuldb.com/vuln/380229 REF https://git.kernel.org/stable/c/1c8587bd025244aa52061f5ceecbf5e68a1063d9 REF https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4 REF https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf

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