CVE-2026-92454 JPEG decoder: truncated segments are read past the image buffer, and a zero sampling factor hangs the decode
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-92454?
CVE-2026-92454 is a medium-severity vulnerability in Eclipse ThreadX - GUIX, published on 20 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-92454?
How do I fix CVE-2026-92454?
No fix has been published for CVE-2026-92454 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-92454 being exploited?
There is no known exploitation of CVE-2026-92454 in the wild and no public exploit code.
Sources
Also known as GHSA-pppm-h3g4-986x.