CVE-2025-20234

A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .

Database specific

{
    "unresolved_ranges": [
        {
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*",
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*",
                "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*"
            ],
            "vendor_product": "cisco:secure_endpoint",
            "extracted_events": [
                {
                    "fixed": "1.26.1"
                },
                {
                    "fixed": "1.26.1"
                },
                {
                    "fixed": "7.5.21"
                },
                {
                    "introduced": "8.0.1.21160"
                },
                {
                    "fixed": "8.4.5"
                }
            ]
        },
        {
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:cisco:secure_endpoint_private_cloud:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "cisco:secure_endpoint_private_cloud",
            "extracted_events": [
                {
                    "fixed": "4.2.2"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/cisco-talos/clamav

Affected ranges

Type

GIT

Repo

https://github.com/cisco-talos/clamav

Events

Introduced

7d26bc8f6a801bb35ff7f2b154f33817e5863ea6

Fixed

d8b053865fd5995f7af98bfbcd98c9a5644bfe2b

Database specific

{
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "1.2.0"
        },
        {
            "fixed": "1.4.3"
        }
    ],
    "cpe": "cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*"
}

Affected versions

clamav-1.*

clamav-1.2.0

clamav-1.3.0

clamav-1.3.0-rc

clamav-1.3.0-rc2

clamav-1.4.0

clamav-1.4.0-rc

clamav-1.4.1

clamav-1.4.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-20234.json"

vanir_signatures

[
    {
        "source": "https://github.com/cisco-talos/clamav/commit/d8b053865fd5995f7af98bfbcd98c9a5644bfe2b",
        "digest": {
            "line_hashes": [
                "190015530276357700342780865688785711289",
                "90010761790201096885469837227264413727",
                "54157981050440576534464352548040004529",
                "229169483082172892455379641560317814455"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "libclamav/bytecode_api.h"
        },
        "id": "CVE-2025-20234-18de29da"
    }
]

vanir_signatures_modified

"2026-07-10T03:06:44Z"