---
id: CVE-2025-70103
title: >-
  Heap buffer overflow vulnerability in libjxl 0.12.0 via crafted PBM images to
  the jxl::extras::DecodeImagePNM function in file lib/extras/dec/pnm.cc.
summary: >-
  Heap buffer overflow vulnerability in libjxl 0.12.0 via crafted PBM images to
  the jxl::extras::DecodeImagePNM function in file lib/extras/dec/pnm.cc.
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-122
published: '2026-05-27'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T16:10:00.443'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-70103'
references:
  - url: 'https://github.com/libjxl/libjxl/issues/4337'
    label: cve@mitre.org
  - url: 'https://github.com/libjxl/libjxl/pull/4338'
    label: cve@mitre.org
  - url: 'https://github.com/sigdevel/pocs/blob/main/res/libjxl/2025/2'
    label: cve@mitre.org
  - url: 'https://infosec.exchange/@sigdevel/116642233929409910'
    label: cve@mitre.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/05/30/7'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/libjxl/libjxl/issues/4337'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00367
epssPercentile: 0.28307
ingestedAt: '2026-10-05T16:25:58.370Z'
---

## Overview

Heap buffer overflow vulnerability in libjxl 0.12.0 via crafted PBM images to the jxl::extras::DecodeImagePNM function in file lib/extras/dec/pnm.cc.

## Remediation

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