CVE-2026-42146

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2026-42146

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42146.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-42146

Aliases

GHSA-g54r-qmgx-c6fv

Downstream

DEBIAN-CVE-2026-42146

UBUNTU-CVE-2026-42146

Published

2026-05-04T17:53:23Z

Modified

2026-08-12T16:24:17Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator

Summary

CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp

Details

CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42146.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/greyclab/cimg

Affected ranges

Type

GIT

Repo

https://github.com/greyclab/cimg

Events

Introduced

Fixed

c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3

Fixed

63ad0902bc0b3b3e82e30d8ac3e5135937bac0c0

Database specific

Show details

{
    "source": "REFERENCES"
}

Affected versions

v.*

v.2.3.0

v.2.3.1

v.2.3.2

v.2.3.3

v.2.3.4

v.2.3.5

v.2.3.6

v.2.4.0

v.2.4.1

v.2.4.2

v.2.4.3

v.2.4.4

v.2.4.5

v.2.5.0

v.2.5.1

v.2.5.2

v.2.5.3

v.2.5.4

v.2.5.5

v.2.5.6

v.2.5.7

v.2.6.0

v.2.6.1

v.2.6.2

v.2.6.3

v.2.6.4

v.2.6.5

v.2.6.6

v.2.6.7

v.2.7.0

v.2.7.1

v.2.7.2

v.2.7.3

v.2.7.4

v.2.7.5

v.2.8.0

v.2.8.1

v.2.8.2

v.2.8.3

v.2.8.4

v.2.9.0

v.3.1.0

v.3.1.1

v.3.1.2

v.3.1.3

v.3.1.4

v.3.1.6

v.3.2.0

v.3.2.1

v.3.2.2

v.3.2.3

v.3.2.4

v.3.2.5

v.3.2.6

v.3.3.0

v.3.3.1

v.3.3.2

v.3.3.3

v.3.3.4

v.3.3.5

v.3.3.6

v.3.4.0

v.3.4.1

v.3.4.2

v.3.4.3

v.3.5.0

v.3.5.1

v.3.5.2

v.3.5.3

v.3.5.4

v.3.5.5

v.3.6.0

v.3.6.1

v.3.6.2

v.3.6.3

v.3.6.4

v.3.6.5

v.3.6.6

v.3.7.0

v.3.7.1

v.3.7.2

v.3.7.3

v.3.7.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42146.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "318172894725783406681287929515958403779",
                "150621348207869847369843225262995890926",
                "131616633530240992493435991106862578432",
                "210207947198146663960019255917778880673"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-42146-f25f270d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/greyclab/cimg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3",
        "target": {
            "file": "CImg.h"
        }
    }
]

vanir_signatures_modified

"2026-08-12T16:24:17Z"