Medium severity · published Oct 20, 2026
CVE-2026-92454
JPEG decoder: truncated segments are read past the image buffer, and a zero sampling factor hangs the decode
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ET
Eclipse ThreadX - GUIX · Eclipse Foundation
through 6.5.1.202602a · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92454
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-92454
github.com
https://github.com/eclipse-threadx/guix/security/advisories/GHSA-pppm-h3g4-986x
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