CVE catalog

CVE-2026-47667

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

[CVE catalog]

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jul 21, 2026, 7:57:49 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.52% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	cimg	sid	`4.0.4+dfsg-1`	fixed
Debian	cimg	forky	`4.0.4+dfsg-1`	fixed
Debian	cimg	trixie	`3.5.2+dfsg-1+deb13u1`	vulnerable
Debian	cimg	bookworm	`3.2.1+dfsg-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	cimg	source	sid	`4.0.4+dfsg-1`	not yet assigned	Not reported	[1142677]
Debian	cimg	source	forky	`4.0.4+dfsg-1`	not yet assigned	Not reported	[1142677]
Debian	cimg	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1142677]
Debian	cimg	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1142677]

[Debian bug #1142677]

Notes

[trixie] cimg: Minor issue [bookworm] cimg: minor issue; DoS

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[cimg-dev]Affected
Source package: [cimg]
Details (2)
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12
[cimg-doc]Affected
Source package: [cimg]
Details (2)
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12
[cimg-examples]Affected
Source package: [cimg]
Details (2)
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12
- 3.2.1+dfsg-1 · all · bookworm
  Affected
  nvd · cimg · debian · bookworm; nvd · cimg · debian · 12

[Debian 13 (Trixie)]

[cimg-dev]Affected
Source package: [cimg]
Details (2)
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13
[cimg-doc]Affected
Source package: [cimg]
Details (2)
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13
[cimg-examples]Affected
Source package: [cimg]
Details (2)
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13
- 3.5.2+dfsg-1+deb13u1 · all · trixie
  Affected
  nvd · cimg · debian · 13

Observed: Oct 23, 2026, 9:43:37 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]