---
id: CVE-2021-44961
title: >-
  A memory leakage flaw exists in the class PerimeterGenerator of Slic3r
  libslic3r 1.3.0 and Master Commit b1a5500
summary: >-
  A memory leakage flaw exists in the class PerimeterGenerator of Slic3r
  libslic3r 1.3.0 and Master Commit b1a5500. Specially crafted stl files can
  exhaust available memory. An attacker can provide malicious files to trigger
  this vulnerabi…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
vendor: slic3r
product: libslic3r
affected:
  - libslic3r = 1.3.0
published: '2022-03-01'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-44961'
references:
  - url: 'https://hackmd.io/nDT_UKLyRQendxDwil9A4w'
    label: cve@mitre.org
  - url: 'http://libslic3r.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://slic3r.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://hackmd.io/nDT_UKLyRQendxDwil9A4w'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00709
epssPercentile: 0.51628
ingestedAt: '2026-07-06T02:09:23.251Z'
---

## Overview

A memory leakage flaw exists in the class PerimeterGenerator of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. Specially crafted stl files can exhaust available memory. An attacker can provide malicious files to trigger this vulnerability.

## Affected

- `libslic3r = 1.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.