CVE-2026-92454
Received Received - Intake

GUIX JPEG Decoder Buffer Overflow and Infinite Loop

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: Eclipse Foundation

Description
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.

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Meta Information

Published
2026-10-20
Last Modified
2026-10-20
Generated
2026-10-20
AI Q&A
2026-10-20
EPSS Evaluated
N/A
NVD
CVE-2026-92454
EUVD
EUVD-2026-105046

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Eclipse Foundation Eclipse ThreadX - GUIX 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
CWE-835 The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Attack-Flow Graph

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Executive Summary

The GUIX JPEG decoder has two flaws. First, it reads marker segments without checking their length, causing out-of-bounds reads past the image buffer. Second, a zero chroma sampling factor leads to an infinite loop during decoding. Both issues occur when the software decoder is enabled by default.

Detection Guidance

Detecting this vulnerability requires checking the GUIX software version. Use commands like 'guix --version' or inspect the library files for GUIX components. If the version is 6.5.1.202602a or earlier, the system is vulnerable.

Impact Analysis

The out-of-bounds reads may corrupt image state variables, causing crashes or limited heap influence. The infinite loop freezes the GUI thread, leading to a denial of service until a watchdog resets the device. This affects availability and stability of systems using GUIX.

Mitigation Strategies

Upgrade GUIX to version 6.5.2.202603 or later. Alternatively, disable the software decoder in GUIX settings or only decode trusted images to prevent exploitation.

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