CVE-2021-22564

MEDIUM
Published Nov 1, 20214y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Nov 1, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

For certain valid JPEG XL images with a size slightly larger than an integer number of groups (256x256 pixels) when processing the groups out of order the decoder can perform an out of bounds copy of image pixels from an image buffer in the heap to another. This copy can occur when processing the right or bottom edges of the image, but only when groups are processed in certain order. Groups can be processed out of order in multi-threaded decoding environments with heavy thread load but also with images that contain the groups in an arbitrary order in the file. It is recommended to upgrade past 0.6.0 or patch with https://github.com/libjxl/libjxl/pull/775

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-122
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 1

VendorProductVersionRange
libjxl_projectlibjxl* ≤0.6.0

References 2

  • github.com https://github.com/libjxl/libjxl/issues/708
    ExploitIssue TrackingThird Party Advisory
  • github.com https://github.com/libjxl/libjxl/pull/775
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/libjxl/libjxl/pull/775
    PatchThird Party Advisory