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Fencer Vulns
medium 5.3

CVE-2025-20234 json

ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

published 2025-06-18 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-27685

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

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 .

Patch / fix

  • cisco clam_antivirus 1.4.3-0
  • cisco clamav 1.4.3-0
  • clamav clamav 1.4.3-0
  • clamavs clamav 1.4.3-0
  • clam_anti-virus clamav 1.4.3-0
  • cisco secure_endpoint 1.26.1, 7.5.21, 8.4.5
  • clamav Debian 14, Debian 13 1.4.3+dfsg-1

debian advisories DEBIAN-CVE-2025-20234

  • clamav Ubuntu 22.04 LTS 1.4.3+dfsg-0ubuntu0.22.04.1
  • clamav Ubuntu 24.04 LTS 1.4.3+dfsg-0ubuntu0.24.04.1
  • clamav Ubuntu Pro 20.04 LTS 1.4.3+dfsg-0ubuntu0.20.04.1+esm1

ubuntu advisories UBUNTU-CVE-2025-20234

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • clamav SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 1.4.3-150600.18.18.1
  • clamav SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 1.4.3-150200.8.14.1
  • clamav SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.4.3-3.47.1

suse advisories SUSE-SU-2025:02201-1SUSE-SU-2025:02200-1SUSE-SU-2025:02119-1

  • clamav openSUSE Tumbleweed 1.4.3-1.1

opensuse advisories openSUSE-SU-2025:15211-1

  • clamav Arch Linux 1.4.3-1

arch linux advisories AVG-2903

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-20234 updated cvss 5.3

clamav: ClamAV Information Disclosure Vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
16 mo ago

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Cisco Cisco Secure Endpoint

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.