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  4. CVE 2026 120740 hivex hivex denial of service via out of bounds
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Back to active CVEs
Low · CVSS 2.0CVE-2026-120740

Hivex: hivex: denial of service via out-of-bounds read in big-data block processingCVE-2026-120740

Answer in brief

CVE-2026-120740 records a Low severity (CVSS 2.0) vulnerability in Hivex: hivex: denial of service via out-of-bounds read in big-data block processing. The current sources do not mark it as known exploited. The current feed maps Red Hat/hivex (generic), Red Hat/virt-devel:rhel/hivex (generic), Red Hat/virt:rhel/hivex (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 2, 2026Updated Nov 2, 2026Source checked Nov 2, 2026First seen by HOL Nov 2, 2026Material review Nov 2, 2026
Upstream Advisory

Key facts

Risk
Low · CVSS 2.0
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 2.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/hivex (generic), Red Hat/virt-devel:rhel/hivex (generic), Red Hat/virt:rhel/hivex (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/hivexgeneric*Not reported
Red Hat/virt-devel:rhel/hivexgeneric*Not reported
Red Hat/virt:rhel/hivexgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/hivex, Red Hat/virt-devel:rhel/hivex, Red Hat/virt:rhel/hivex.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 2, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source 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).

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • psqlODBC does not validate server-supplied counts and lengthsAlso CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Nov 2, 2026
References
2 linked sources
Open source record