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AI / ML CVE-2026-3172

HIGH
Integer Underflow (CWE-191)
2026-02-25 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Buffer Overflow Denial Of Service Red Hat AI / ML Suse
8.1
CVSS 3.1 · NVD
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Attack ChainAIDerived

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

  1. Access
    Authenticate as database user
  2. Exploit
    Execute CREATE INDEX with parallel HNSW build
  3. Execution
    Trigger buffer overflow in index construction
  4. Impact
    Read arbitrary memory or crash server

Vulnerability Assessment

Weakness
CWE
CWE-191
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Integer underflow checks
Exploitation Conditions

PostgreSQL with pgvector extension versions 0.6.0 through 0.8.1 installed. Attacker requires valid database user credentials. Parallel HNSW index building must be enabled or triggered during CREATE INDEX operation on vector columns.
Impact

CVSS 8.1 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Buffer overflow in parallel HNSW index build in pgvector 0.6.0 versions up to 0.8.1 is affected by integer underflow (CVSS 8.1).

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

Affected ProductsAI

Product: Buffer overflow in parallel HNSW index build in pgvector 0.6.0. Versions: up to 0.8.1.

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Technical ContextAI · show details

This vulnerability (CWE-191: Integer Underflow) affects Buffer overflow in parallel HNSW index build in pgvector 0.6.0. Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.

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Severity by source

NVD PRIMARY 8.1 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SUSE HIGH
Red Hat 6.8 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

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

DescriptionCVE.org

Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.

Executive ViewAI

Why It Matters

A critical buffer overflow vulnerability in pgvector (versions 0.6.0-0.8.1) could allow attackers to execute arbitrary code or crash database services. Organizations using pgvector for vector similarity search in PostgreSQL deployments face immediate risk of data breach or service disruption, with no vendor patch currently available.

Business Impact: High
Compensating Controls

Disable HNSW parallel index building in pgvector configuration (use sequential index build); implement strict network segmentation limiting database access to trusted application servers only; deploy WAF rules to monitor for exploitation attempts targeting vector operations; enable PostgreSQL audit logging for all index build operations; restrict database user privileges to minimum required; implement connection pooling and query rate limiting; establish continuous monitoring for abnormal database process behavior and memory usage spikes.

Threat Intelligence Overview

EPSS Score
0.0%
Top 86% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub

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 Yes
EPSS 0.0%
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
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

60
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

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.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Server Applications 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP6-LTSS Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
openSUSE Leap 15.6 Fixed
openSUSE Tumbleweed Fixed

References

Advisories & patches
ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:1068/ REF https://github.com/pgvector/pgvector/issues/959

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