CVE-2025-70100

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Source

https://cve.org/CVERecord?id=CVE-2025-70100

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-70100.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2025-70100

Published

2026-06-03T00:00:00Z

Modified

2026-07-24T03:56:52.650915986Z

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

[none]

Details

A divide-by-zero vulnerability in the ext4blocksetlbsize function in src/ext4blockdev.c of the lwext4 1.0.0 library allows attackers to cause a denial of service by providing a malformed ext4 filesystem image that results in a zero logical block size. The vulnerability is triggered during mount or image processing and leads to a Floating-Point Exception (FPE) under sanitizers or a runtime crash in standard builds due to missing validation of lbsize.

Database specific

{
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/70xxx/CVE-2025-70100.json"
}

References

Affected packages

Git / github.com/gkostka/lwext4

Affected ranges

Type

GIT

Repo

https://github.com/gkostka/lwext4

Events

Introduced

890484c72dbb321535127625c3686e51f1f424b9

Last affected

890484c72dbb321535127625c3686e51f1f424b9

Database specific

{
    "source": "CPE_STRING",
    "cpe": "cpe:2.3:a:gkostka:lwext4:1.0.0:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.0.0"
        },
        {
            "last_affected": "1.0.0"
        }
    ]
}

Affected versions

1.*

1.0.0

v1.*

v1.0.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-70100.json"