CVE-2025-12474

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

Published Feb 11, 2026 CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Libjxl Project
Libjxl Project libjxl
CPEs cpe:2.3:a:libjxl_project:libjxl:*:*:*:*:*:*:*:*
Vendors & Products Libjxl Project
Libjxl Project libjxl
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L'}

cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

Type Values Removed Values Added
Weaknesses CWE-125
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L'}

threat_severity

Low

Type Values Removed Values Added
First Time appeared Google
Google libjxl
Vendors & Products Google
Google libjxl
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title libjxl: Uninitialized memory read in decoder due to incorrect optimization in patch handling
Weaknesses CWE-908
References
Metrics cvssV4_0

{'score': 2.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Feb 11, 2026, 9:41 PM
Reserved
Oct 29, 2025, 4:11 PM
Status
Analyzed
Published
Feb 11, 2026, 4:15 PM
Modified
Jun 17, 2026, 8:32 AM
Severity
Low
Public date
Feb 11, 2026, 3:27 PM