CVE-2025-12474

libjxl: Uninitialized memory read in decoder due to incorrect optimization in patch handling

State: Published
Severity: 2.3 Low
Published: Feb 11, 2026
Updated: Feb 11, 2026
Reserved: Oct 29, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	Google

Weaknesses

CWE-908 Use of Uninitialized Resource

Affected Products

Product	Versions
libjxlGoogle	0.7 through 0.11.1Affected

References

https://github.com/libjxl/libjxl/pull/4495

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