CVE Catalog

CVE-2026-47667

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.43%

35th percentile - higher than 35% of all known CVEs

Summary

Vulnerability in CImg Library before version 4.0.0. The `_load_analyze()` function reads the `header_size` field from an Analyze/NIfTI file and allocates memory without checking the file size, potentially causing memory leaks (e.g., 1.3 GB per call) with a crafted 6-byte file.

Risk Assessment

Risk of server memory exhaustion by a remote attacker, potentially leading to denial of service (DoS) in image processing applications.

Recommendation

Update CImg Library to version 4.0.0 or later. Restrict access to Analyze/NIfTI file loading functions from untrusted sources.

Related vulnerabilities

Original NVD description (English source)

CImg Library is a C++ library for image processing. Prior to version 4.0.0 in `_load_analyze()`, the header_size field is read as an `unsigned int` from the first 4 bytes of an Analyze/NIfTI file and passed directly to `new unsigned char[header_size]` without being bounded against the actual file size. A value up to ~4 GB is accepted. If the subsequent `fread` returns `short` as it will for any malformed file), the function throws a `CImgIOException` and the allocated buffer is never freed. A 6-byte crafted file is sufficient to trigger an allocation of ~1.3 GB per call, with the full allocation leaked on every error path. The issue is reachable via `load_analyze()` and the generic `load()` when the file extension is .hdr, .img, or .nii. Version 4.0.0 fixes the issue.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS