CVE-2026-120740

Description

A flaw was found in hivex. By supplying a specially crafted Windows registry hive file, an attacker can trigger an out-of-bounds memory read when hivex parses registry values containing malformed large data block lists. This issue can cause the application processing the registry file to crash, resulting in a Denial of Service (DoS).

Overview

State: PUBLISHED
Assigner (CNA): redhat
CVSS severity: LOW
CVSS score: 2.0 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L
Effective score: 2.0 / 10 LOW source: CNA overview
CWE(s): CWE-125
Reserved: 2026-11-02
Published: 2026-11-02 21:54 UTC
Last updated: 2026-11-02 22:15 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120740.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-11-02 22:17:21 UTC
NVD last modified: 2026-11-02 22:17:21 UTC
NVD CVSS v3.1: 2.0 / 10 LOW source: secalert@redhat.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L
Exploitability subscore: 0.5 / 10
Impact subscore: 1.4 / 10
EPSS score: 0.0024 (probability of exploitation in next 30 days)
EPSS percentile: 14.81% vs all CVEs — higher = more likely to be exploited, as of 2026-11-03

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-115639
Assigner: redhat
Published: Nov 2, 2026, 9:54:45 PM
Updated: Nov 2, 2026, 10:15:26 PM
EUVD base score (CVSS 3.1): 2.0 / 10
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L
EUVD-reported EPSS: 0.0000
Aliases: GHSA-r95m-g8f5-qf3h

ENISA description: A flaw was found in hivex. By supplying a specially crafted Windows registry hive file, an attacker can trigger an out-of-bounds memory read when hivex parses registry values containing malformed large data block lists. This issue can cause the application processing the registry file to crash, resulting in a Denial of Service (DoS).

EUVD references (2)

Affected products (6)

Vendor	Product	Versions	Platforms
Red Hat	Red Hat Enterprise Linux 10	—	—
Red Hat	Red Hat Enterprise Linux 6	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://access.redhat.com/security/cve/CVE-2026-120740 vdb-entryx_refsource_REDHAT
RHBZ#2565405 issue-trackingx_refsource_REDHAT

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://access.redhat.com/security/cve/CVE-2026-120740 secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2565405 secalert@redhat.com

Remediations (10)

Security Updates - Red Hat Customer Portal

web:access.redhat.com

This page provides powerful search and filter options to find security-related errata (RHSA) by date, product, architecture, and more.

2026-11-03 12:34 UTC
CVE-2026-120740 - Vulnerability Details - OpenCVE

web:app.opencve.io

A flaw was found in hivex. By supplying a specially crafted Windows registry hive file, an attacker can trigger an out-of-bounds memory read when hivex parses registry values containing malformed large data block lists. This issue can cause the application processing the registry file to crash, resulting in a Denial of Service (DoS).

2026-11-03 12:34 UTC
Security Update: Immediate Guidance for CVE-2026-107406 in NetScaler ...

web:community.citrix.com

Today, Citrix published a critical security bulletin for NetScaler ADC and NetScaler Gateway regarding CVE - 2026 -107406. CVE - 2026 -107406 is a memory overflow vulnerability that may lead to remote code execution or denial of service under specific configuration conditions. The issue carries a CVSS ...

2026-11-03 12:34 UTC
Identify and remediate vulnerabilities for CVE-2026-107406

web:docs.netscaler.com

Remediate CVE - 2026 -107406 For CVE - 2026 -107406 impacted NetScaler instances, the remediation is a single-step process and you need to upgrade the vulnerable NetScaler instances to a release and build that has the fix . In the GUI, under CVE Detection > Impacted Instances, select the instances and click Proceed to upgrade workflow.

2026-11-03 12:34 UTC
CVE-2026-120740 - Exploits & Severity - Feedly

web:feedly.com

Timeline Highlight events Vendor advisory RedHat CVE advisory released a security advisory ( CVE-2026-120740 ).

2026-11-03 12:34 UTC
CITRIX | Support - Citrix Customer Support

web:support.citrix.com

Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE - 2026 -107406

2026-11-03 12:34 UTC
Citrix warns admins to patch new NetScaler RCE flaw immediately

web:www.bleepingcomputer.com

Citrix has warned IT administrators to patch systems immediately against a new critical vulnerability affecting NetScaler ADC networking appliances and NetScaler Gateway secure remote access ...

2026-11-03 12:34 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-11-03 12:34 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-03 12:34 UTC
CVE-2026-120740: Red Hat: A flaw was found in hivex - Rapid7

web:www.rapid7.com

CVE-2026-120740 : Red Hat: A flaw was found in hivex. View severity, references, and remediation details from Rapid7.

2026-11-03 12:34 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120740.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "hivex",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "hivex",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "hivex",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "packageName": "virt-devel:rhel/hivex",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "virt:rhel/hivex",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "packageName": "hivex",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Nguyen Dinh Hai (github.com/Haind03) for reporting this issue."
        }
      ],
      "datePublic": "2026-11-01T00:00:00.000Z",
      "descriptions": [
        {
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        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Low"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 2,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T22:15:26.318Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-120740"
        },
        {
          "name": "RHBZ#2565405",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2565405"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-11-02T20:47:19.598Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-11-01T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Hivex: hivex: denial of service via out-of-bounds read in big-data block processing",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-125: Out-of-bounds Read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
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    "datePublished": "2026-11-02T21:54:45.435Z",
    "dateReserved": "2026-11-02T20:44:20.600Z",
    "dateUpdated": "2026-11-02T22:15:26.318Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}