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OpenSSH (Alpine Linux) CVE-2025-61985

LOW
Improper Neutralization of Null Byte or NUL Character (CWE-158)
N/A vendor:alpine
3.6
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 SSH-exposed Alpine host
  2. Exploit
    Trigger unknown vulnerability in OpenSSH
  3. Impact
    Achieve unconfirmed impact

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Metacharacter neutralization
Exploitation Conditions

Exploitation conditions cannot be determined from the available data - no vulnerability description, CWE, or CVSS vector was provided. It is unknown whether exploitation requires authentication, a specific SSH configuration option, a particular Alpine Linux branch, or client versus server context. What is known: the fix is in the openssh package on Alpine Linux at version 10.1_p1-r0, implying prior versions are vulnerable. The EPSS score of 0.06% suggests no widespread active exploitation has been observed. Authentication requirements not confirmed from available data.

Impact

Risk assessment is severely constrained by missing data. No CVSS vector is available, so attack vector, complexity, required privileges, user interaction, and scope are all unconfirmed. The EPSS score of 0.06% at the 19th percentile indicates low exploitation probability relative to the broader CVE population, which is consistent with the absence of KEV listing and no known public exploit. The vendor (Alpine Linux) is the sole reporting source, and no independent corroboration from NVD, CISA, or upstream OpenSSH maintainers is reflected in the available data. Real-world priority should be treated as LOW-to-MODERATE based solely on EPSS signals, but this assessment could change significantly if CVSS or a detailed vulnerability description becomes available. The absence of data is not confirmation of low severity.

Exploit ScenarioDerived

Without a description of the vulnerability class or CVSS vector, a realistic attack scenario cannot be responsibly constructed. If the flaw affects the SSH daemon's network-facing code, an attacker with network access to an exposed SSH port could potentially trigger it; if it is a local privilege escalation or client-side issue, the exposure would be significantly more limited. No public exploit has been identified at time of analysis.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – May 27, 2026

OpenSSH on Alpine Linux was patched in version 10.1_p1-r0, addressing an unspecified security vulnerability tracked as CVE-2025-61985. The nature of the flaw, affected versions prior to the fix, and the attacker-accessible impact have not been disclosed in the available intelligence. No public exploit has been identified at time of analysis, and the EPSS score of 0.06% (19th percentile) suggests low observed exploitation probability.

RemediationAI

Upgrade the openssh package on Alpine Linux to version 10.1_p1-r0 or later using the Alpine package manager: 'apk update && apk upgrade openssh'. This is the vendor-confirmed fix per the Alpine Linux security advisory. If an immediate upgrade is not possible, consider restricting SSH access via firewall rules to trusted IP ranges, disabling password authentication in favor of key-based auth (already a best practice), and monitoring SSH daemon logs for anomalous activity. No specific workaround was detailed in the available data because the vulnerability type is unknown - these compensating controls are general SSH hardening measures and may not directly address the specific flaw. No upstream OpenSSH advisory URL was provided in the intelligence data.

Affected ProductsAI

Alpine Linux systems running OpenSSH versions prior to 10.1_p1-r0 are affected. The specific Alpine Linux release branches (e.g., Alpine 3.x edge, stable) that contain the vulnerable package have not been enumerated in the available data. No CPE strings were provided to confirm the exact package scope. Administrators should consult the Alpine Linux security tracker and package changelogs for the full list of affected branches.

Affects your stack

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Technical ContextAI · show details

OpenSSH is the widely deployed SSH daemon and client suite used for encrypted remote access. Alpine Linux packages OpenSSH and maintains its own patch cadence; the fix version 10.1_p1-r0 corresponds to Alpine's packaging of OpenSSH 10.1 patch level 1 with Alpine-specific revision 0. No CWE classification was provided in the available data, making it impossible to confirm the root cause class - possible categories for OpenSSH vulnerabilities historically include memory corruption, authentication bypass, information disclosure, or privilege escalation, but none can be attributed here without vendor disclosure. No CPE strings were provided to further narrow the affected component.

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Severity by source

Vendor (vendor:alpine) PRIMARY 3.6 LOW
AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

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

CVSS VectorVendor: vendor:alpine

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

Lifecycle Timeline

1
CVSS changed
Jul 14, 2026 - 13:22 NVD
3.6 (LOW)

DescriptionCVE.org

Alpine Linux: openssh fixed in 10.1_p1-r0

Threat Intelligence Overview

EPSS Score
0.1%
Top 81% exploitable
Threat Intel
1
1 source
Data Quality
4 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 LOW
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat Yes
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Low

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +18
PoC: 0
Weaponized: 0
Threat intel: +10
Gov advisory: 0

Attack Technique

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

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