---
id: CVE-2026-92454
title: >-
  JPEG decoder: truncated segments are read past the image buffer, and a zero
  sampling factor hangs the decode
summary: >-
  The GUIX software JPEG decoder reads four kinds of marker segment without
  checking that each is long enough to hold what it reads. A truncated segment
  is therefore read past the end of the caller's image buffer. Separately, a
  zero chroma…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-125
  - CWE-835
vendor: Eclipse Foundation
product: GUIX
affected:
  - GUIX <= 6.5.1.202602a
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T15:21:00.502903Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:21:42.800Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-92454'
references:
  - url: >-
      https://github.com/eclipse-threadx/guix/security/advisories/GHSA-pppm-h3g4-986x
tags:
  - cve.org
ingestedAt: '2026-10-20T15:09:24.109Z'
---

## Overview

The GUIX software JPEG decoder reads four kinds of marker segment without checking that each is long enough to hold what it reads. A truncated segment is therefore read past the end of the caller's image buffer. Separately, a zero chroma sampling factor makes the block decode loop non-terminating. Both reproduce in the default configuration, in which `GX_SOFTWARE_DECODER_SUPPORT` is enabled.

## Affected

- `GUIX <= 6.5.1.202602a`

## Remediation

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