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  4. CVE 2026 118446 use after free in instrux array members in
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Back to active CVEs
Medium · CVSS 6.9CVE-2026-118446

Use-after-free in INSTRUX array members in pybddisasmCVE-2026-118446

Answer in brief

CVE-2026-118446 records a Medium severity (CVSS 6.9) vulnerability in Use-after-free in INSTRUX array members in pybddisasm. The current sources do not mark it as known exploited. The current feed maps Bitdefender/pybddisasm (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 3, 2026Updated Nov 3, 2026Source checked Nov 3, 2026First seen by HOL Nov 3, 2026Material review Nov 3, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.9. 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 Bitdefender/pybddisasm (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Bitdefender/pybddisasmgeneric>=0 <=0.3.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Bitdefender/pybddisasm.
  2. 2Review the reported fix. Source-reported solution: Discontinue use of the unmaintained pybddisasm package. No fixed release has been identified for this draft.

Evidence timeline and material changes

  1. Published upstream

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  2. Source modified

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record
  3. First seen by HOL

    Nov 3, 2026

Sources and claim methodology

  • Source referencepypi.org
Upstream source description

A use-after-free vulnerability in the pybddisasm Python bindings affects array-valued members of INSTRUX objects, including ND_OPERAND arrays. These arrays are exposed as Python lists whose elements reference memory owned by the parent INSTRUX object. Retaining a list or an element does not keep the parent allocation alive. Accessing an element after the parent INSTRUX object has been freed therefore accesses freed memory. Depending on how the element is used and whether the freed allocation has been reused, this may expose process memory or cause the Python process to crash. Exploitation requires an application to retain and subsequently access an array element after the parent object has been freed. The pybddisasm package is no longer maintained.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Out-of-bounds reads during instruction decoding in pybddisasmSame bitdefender/pybddisasm package
  • Use-after-free in INSTRUX structure members in pybddisasmSame bitdefender/pybddisasm package
  • Uninitialized INSTRUX contents returned after decoding failure in pybddisasmSame bitdefender/pybddisasm package
  • Uninitialized output buffer returned after nd_to_text failure in pybddisasmSame bitdefender/pybddisasm package
  • ThreadX Modules invokes trace-full callbacks after module unloadAlso CWE-416

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record