CVE-2022-36788Network attack vector

Heap overwrite via stale cloned facet capacity

Published Apr 20, 2023 · Updated Aug 3, 2024

Heap-based buffer overflow in Slic3r libslic3r 1.3.0 and Master Commit b1a5500 allows attackers to corrupt memory via a crafted STL file. TriangleMesh::clone allocates facet_start for number_of_facets but retains the larger facets_malloced value; stl_add_facet then skips reallocation and writes beyond the smaller allocation. Processing the file is required, and the demonstrated consequence is an AddressSanitizer-detected crash during mesh repair.

CVSS severity8.1
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Slic3r libslic3r 1.3.0 and Master Commit b1a5500 allows attackers to corrupt memory via a crafted STL file. TriangleMesh::clone allocates facet_start for number_of_facets but retains the larger facets_malloced value; stl_add_facet then skips reallocation and writes beyond the smaller allocation. Processing the file is required, and the demonstrated consequence is an AddressSanitizer-detected crash during mesh repair.

The record

CVE
CVE-2022-36788
Published
Apr 20, 2023
Updated
Aug 3, 2024
Vendor
Slic3r
Product
libslic3r
Classifications
CWE-787, CWE-130
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.0
  2. Affected versionversion=Master Commit b1a5500

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Slic3r · libslic3rversion=1.3.0; version=Master Commit b1a5500

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.1Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-130Improper Handling of Length Parameter Inconsistency

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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