Out of Bounds Read/Write Vulnerability in JPEG XL Encoder by Cloudflare

CVE-2024-11403

What is CVE-2024-11403?

An out of bounds read/write vulnerability exists in the JPEG XL encoder component from Cloudflare’s LibJXL library. This issue arises during the JPEG recompression process when handling untrusted input, particularly when the JxlEncoderAddJPEGFrame function is used. The JPEG decoder fails to adequately check buffer bounds, potentially resulting in out-of-bounds writes. The vulnerability is also present in jpegli, which may lead to reading uninitialized memory or function addresses. This poses significant security risks, especially in environments processing untrusted data.

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