CVE-2026-1837

A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags).

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/libjxl/libjxl/issues/4549	Exploit Issue Tracking Patch
https://access.redhat.com/security/cve/CVE-2026-1837
https://bugzilla.redhat.com/show_bug.cgi?id=2438974
https://github.com/libjxl/libjxl/issues/4549	Exploit Issue Tracking Patch
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1837.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:libjxl_project:libjxl:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-11 16:16

Updated : 2026-07-15 02:18

NVD link : CVE-2026-1837

Mitre link : CVE-2026-1837

CVE.ORG link : CVE-2026-1837

JSON object : View

Products Affected

libjxl_project

libjxl

CWE

CWE-805

Buffer Access with Incorrect Length Value

CWE-770

Allocation of Resources Without Limits or Throttling

CWE-787

Out-of-bounds Write

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Soon after that data from another uninitialized unallocated region is copied to pixel data.\n\nThis can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags)."}, {"lang": "es", "value": "Un archivo especialmente dise\u00f1ado puede provocar que el decodificador de libjxl escriba datos de p\u00edxeles en memoria no asignada no inicializada. Poco despu\u00e9s, datos de otra regi\u00f3n no asignada no inicializada se copian a los datos de p\u00edxeles.\n\nEsto puede hacerse al solicitar una transformaci\u00f3n de color de im\u00e1genes en escala de grises a otro espacio de color en escala de grises. B\u00faferes asignados para 1 flotante por p\u00edxel se utilizan como si estuvieran asignados para 3 flotantes por p\u00edxel. Esto ocurre solo si se utiliza LCMS2 como motor CMS. Hay otro motor CMS disponible (seleccionado mediante indicadores de compilaci\u00f3n)."}], "lastModified": "2026-07-15T02:18:21.220", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libjxl_project:libjxl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3D1B55EA-A475-47E9-9562-D77E7B519780", "versionEndIncluding": "0.11.1", "versionStartIncluding": "0.9.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}