---
id: CVE-2026-118445
title: Use-after-free in INSTRUX structure members in pybddisasm
summary: >-
  A use-after-free vulnerability in the pybddisasm Python bindings affects
  structure-valued members of INSTRUX objects. These members are exposed through
  Python objects that reference memory owned by the parent INSTRUX object. A
  retained r…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-416
vendor: Bitdefender
product: pybddisasm
affected:
  - pybddisasm <= 0.3.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:24:04.209795Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:32:37.927Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118445'
references:
  - url: 'https://pypi.org/project/pybddisasm/'
tags:
  - cve.org
epss: 0.00105
epssPercentile: 0.0105
ingestedAt: '2026-11-05T20:33:06.364Z'
---

## Overview

A use-after-free vulnerability in the pybddisasm Python bindings affects structure-valued members of INSTRUX objects. These members are exposed through Python objects that reference memory owned by the parent INSTRUX object. A retained reference to a member does not keep the parent allocation alive. Accessing the member after the parent INSTRUX object has been freed therefore accesses freed memory. Depending on how the member 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 a member reference after the parent object has been freed. The pybddisasm package is no longer maintained.

## Affected

- `pybddisasm <= 0.3.0`

## Remediation

Discontinue use of the unmaintained pybddisasm package. No fixed release will become available.