CVE-2025-48172

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Source
https://cve.org/CVERecord?id=CVE-2025-48172
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48172.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-48172
Downstream
Related
Published
2025-07-04T00:00:00Z
Modified
2026-07-22T04:02:04.495130Z
Severity
  • 5.6 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L CVSS Calculator
Summary
[none]
Details

CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chmlib.c chmdecompressblock integer overflow. There is a resultant heap-based buffer overflow in chmfetch_bytes.

Database specific 
{
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48172.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "last_affected": "2bef8d063ec7d88a8de6fd9f0513ea42ac0fa21f"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "last_affected": "2bef8d063ec7d88a8de6fd9f0513ea42ac0fa21f"
                }
            ],
            "source": "CPE_FIELD"
        },
        {
            "extracted_events": [
                {
                    "fixed": "2bef8d0"
                }
            ],
            "source": "DESCRIPTION"
        }
    ],
    "cwe_ids": [
        "CWE-190"
    ]
}
References

Affected packages

Git / github.com/sumatrapdfreader/sumatrapdf

Affected ranges

Type
GIT
Repo
https://github.com/sumatrapdfreader/sumatrapdf
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
08179946a745cf1605e4b9670942ec1a6e1f4c5d
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

1.*
1.4split
1.5split
1.6split
1.7split
1.8split
1.9split
2.*
2.0split
2.1split
2.2split
2.3split
2.4split
2.5split
3.*
3.0split
3.1.2rel
3.2

Database specific

vanir_signatures 
[
    {
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "id": "CVE-2025-48172-611254ad",
        "digest": {
            "line_hashes": [
                "195892175625739598384565738886928693113",
                "149253868867704403655622444990774444724",
                "103492216121940087843497286654604125259",
                "297680089826767714702311139057703178215",
                "80842639067664548787265453842758717036",
                "314010403109654087180972229494859459488"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/sumatrapdfreader/sumatrapdf/commit/08179946a745cf1605e4b9670942ec1a6e1f4c5d",
        "target": {
            "file": "ext/CHMLib/chm_lib.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "id": "CVE-2025-48172-c028f054",
        "digest": {
            "function_hash": "286458521566129013419023656621431881358",
            "length": 739.0
        },
        "source": "https://github.com/sumatrapdfreader/sumatrapdf/commit/08179946a745cf1605e4b9670942ec1a6e1f4c5d",
        "target": {
            "file": "ext/CHMLib/chm_lib.c",
            "function": "_unmarshal_lzxc_reset_table"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48172.json"
vanir_signatures_modified 
"2026-07-22T04:02:04Z"