CVE-2025-12474
libjxl: libjxl: Uninitialized memory read in decoder due to incorrect optimization in patch handling
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 12, 2026
Updated · April 25, 2026
Description
An out of bounds read flaw has been discovered in libjxl. A specially-crafted file can cause libjxl's decoder to read pixel data from uninitialized (but allocated) memory. This can be done by causing the decoder to reference an outside-image-bound area in a subsequent patches. An incorrect optimization causes the decoder to omit populating those areas.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 3.1CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE-125 · Out-of-bounds Read