---
id: CVE-2026-110603
title: >-
  LASzip through 3.5.0 contains an invalid free vulnerability in
  laszip_read_header() that allows attackers to free uninitialized heap pointers
  via truncated variable length record data
summary: >-
  LASzip through 3.5.0 contains an invalid free vulnerability in
  laszip_read_header() that allows attackers to free uninitialized heap pointers
  via truncated variable length record data. Attackers can supply a crafted
  LAS/LAZ file with an …
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H'
cwe:
  - CWE-824
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T15:17:11.820'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110603'
references:
  - url: 'https://github.com/LASzip/LASzip/blob/3.5.0/src/laszip_dll.cpp#L3967-L3995'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/LASzip/LASzip/blob/3.5.0/src/laszip_dll.cpp#L497-L511'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/LASzip/LASzip/commit/c9bfd3e68d65c84d513a2286ae06cbbe17afda02
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/laszip-vlr-uninitialized-free'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/laszip-through-3.5.0-invalid-free-via-truncated-vlr-header-in-laszip-read-header
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:14.002Z'
---

## Overview

LASzip through 3.5.0 contains an invalid free vulnerability in laszip_read_header() that allows attackers to free uninitialized heap pointers via truncated variable length record data. Attackers can supply a crafted LAS/LAZ file with an inflated VLR count that, when opened and destroyed through the C API, crashes the process and corrupts the heap.

## Remediation

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