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netatalk EUVDEUVD-2026-60326

| CVE-2026-45698 HIGH
Integer Underflow (CWE-191)
N/A vendor:alpine
7.5
CVSS 3.1 · Vendor: vendor:alpine
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Access netatalk service (TCP/548)
  2. Exploit
    Send crafted AFP request
  3. Execution
    Trigger unspecified vulnerability
  4. Impact
    Achieve unknown impact

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer underflow checks
Exploitation Conditions

Exploitation conditions cannot be determined from available data - no CVSS vector, CWE, or descriptive detail is present in this CVE record. The authentication requirements, required configuration, and whether default deployments are affected are all unknown. What limits the ability to assess risk: the CVE description contains only the fix version, with no disclosure of the triggering condition, affected protocol operation, or required system state. Security teams should consult the Alpine Linux security advisory and upstream netatalk release notes for version 4.4.3 to identify specific exploitation prerequisites.

Impact

Risk cannot be formally assessed from the available data. No CVSS score or vector is present, meaning attack vector, complexity, privilege requirements, and scope are all unknown. No EPSS probability has been provided. The vulnerability is not listed in the CISA KEV catalog, and no public exploit or POC code has been identified at time of analysis. The sole signal is a vendor-issued patch from Alpine Linux, which indicates the maintainers judged the fix necessary but provides no severity context. Netatalk historically has carried high-severity vulnerabilities (including remote code execution), so the absence of a CVSS score should not be interpreted as low severity - it reflects incomplete disclosure, not confirmed low impact. Risk rating is indeterminate pending full CVE details.

Exploit ScenarioDerived

Without CVSS vector or vulnerability description details, a specific exploit scenario cannot be constructed from confirmed data. Generically, netatalk exposes AFP over TCP/548; a historical pattern for netatalk vulnerabilities involves a remote or adjacent attacker sending malformed AFP requests to trigger the flaw. No POC code has been identified at time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – May 27, 2026

Netatalk on Alpine Linux contains an unspecified vulnerability addressed by the Alpine package maintainers in version 4.4.3-r0. The nature of the flaw, affected attack surface, and impact have not been disclosed in the available intelligence - the sole data point is the vendor-issued Alpine Linux package fix. Security teams should treat this as a pending-disclosure patch event and apply the update while awaiting a full CVE write-up.

RemediationAI

The primary remediation is to upgrade the Alpine Linux netatalk package to version 4.4.3-r0 or later using the standard Alpine package manager: 'apk upgrade netatalk'. No advisory URL was included in the available data; consult the Alpine Linux security tracker for this CVE for additional guidance. If an immediate upgrade is not feasible and netatalk is not actively required, consider disabling the netatalk service ('rc-service netatalk stop && rc-update del netatalk') to eliminate the attack surface entirely as a compensating control - note that this will interrupt AFP file sharing for any macOS clients depending on the service. If AFP sharing is operationally required, restricting firewall access to TCP/548 (AFP) to only trusted macOS client IP ranges reduces exposure until patching is completed.

Affected VersionsENISA

Netatalk 3.1.19, < 4.4.3

Affected Packages

euvd netatalk_3_1_19 fix: 4.4.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Netatalk is an open-source implementation of the Apple Filing Protocol (AFP), enabling file sharing between Unix/Linux systems and Apple macOS clients over a network. It is commonly deployed in NAS appliances and servers that serve macOS workstations. The vulnerability is present in the netatalk package as distributed by Alpine Linux; the fixed package version is 4.4.3-r0. No CWE root cause classification is available in the provided data, and no CPE strings were supplied, so the exact netatalk upstream version corresponding to the Alpine package fix cannot be confirmed from this record alone.

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Severity by source

Vendor (vendor:alpine) PRIMARY 7.5 HIGH
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (vendor:alpine) · only source for this CVE.

CVSS VectorVendor: vendor:alpine

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

Lifecycle Timeline

1
Patch available
Aug 17, 2026 - 19:18 EUVD

DescriptionCVE.org

Alpine Linux: netatalk fixed in 4.4.3-r0

Threat Intelligence Overview

EPSS Score
0.3%
Top 80% exploitable
Data Quality
5 sources
Confidence: Medium

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 HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
No
Human Impact· derived
Medium

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

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

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