CVE-2025-20234
clamav: A vulnerability in Universal Disk Format (UDF) processing of ClamAV couldallow an unauthenticated, remote attacker to...
CVE-2025-20234 is fixed in 24 products on 1 platform, first by clamav 1.4.3+dfsg-0ubuntu0.20.04.1+esm1, released June 18, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0082
57th percentile
A vulnerability in Universal Disk Format (UDF) processing of ClamAV couldallow 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. Anattacker could exploit this vulnerability by submitting a crafted filecontaining UDF content to be scanned by ClamAV on an affected device. Asuccessful exploit could allow the attacker to terminate the ClamAVscanning process, resulting in a DoS condition on the affected software.For a description of this vulnerability, see the .
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| clamav · Debian 13.5 (trixie) | 1.4.3+dfsg-1 | DEBIAN-CVE-2025-20234 | Jun 18, 2025 |
| clamav · Debian 14 | 1.4.3+dfsg-1 | DEBIAN-CVE-2025-20234 | Jun 18, 2025 |
| clamav · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav · opensuse-leap 15.6 | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 | Jul 2, 2025 |
| clamav · sles 15.6 | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 | Jul 2, 2025 |
| clamav · sles 15.7 | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 | Jul 2, 2025 |
| clamav-base · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-base 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-base · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-base 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-base · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-base 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-base · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav-base 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav-base · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav-base 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav-daemon · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-daemon 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-daemon · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-daemon 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-daemon · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-daemon 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-daemon · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav-daemon 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav-daemon · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav-daemon 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav-docs · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-docs 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-docs · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-docs 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-docs · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-docs 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-freshclam · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-freshclam 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-freshclam · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-freshclam 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-freshclam · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-freshclam 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-freshclam · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav-freshclam 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav-freshclam · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav-freshclam 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav-milter · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-milter 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-milter · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-milter 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-milter · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-milter 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-milter · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav-milter 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav-milter · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav-milter 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav-testfiles · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamav-testfiles 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamav-testfiles · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamav-testfiles 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamav-testfiles · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamav-testfiles 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamav-testfiles · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamav-testfiles 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamav-testfiles · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamav-testfiles 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| clamav1.4 · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-data · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-debuginfo · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-debugsource · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-devel · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-doc · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-filesystem · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-freshclam · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-freshclam-debuginfo · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-lib · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-lib-debuginfo · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-milter · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamav1.4-milter-debuginfo · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamd1.4 · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamd1.4-debuginfo · amzn 2023 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 | Jul 3, 2025 |
| clamdscan · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | clamdscan 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| clamdscan · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | clamdscan 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| clamdscan · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | clamdscan 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| clamdscan · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | clamdscan 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| clamdscan · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | clamdscan 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
| libclamav12 · Ubuntu 20.04 LTS (focal) | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | libclamav12 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | Jun 18, 2025 |
| libclamav12 · Ubuntu 22.04.1 LTS (jammy) | 1.4.3+dfsg-0ubuntu0.22.04.1 | libclamav12 1.4.3+dfsg-0ubuntu0.22.04.1 | Jun 18, 2025 |
| libclamav12 · Ubuntu 24.04.5 LTS (noble) | 1.4.3+dfsg-0ubuntu0.24.04.1 | libclamav12 1.4.3+dfsg-0ubuntu0.24.04.1 | Jun 18, 2025 |
| libclamav12 · Ubuntu 24.10 (oracular) | 1.4.3+dfsg-0ubuntu0.24.10.1 | libclamav12 1.4.3+dfsg-0ubuntu0.24.10.1 | Jan 16, 2026 |
| libclamav12 · Ubuntu 25.04 (plucky) | 1.4.3+dfsg-0ubuntu0.25.04.1 | libclamav12 1.4.3+dfsg-0ubuntu0.25.04.1 | Jan 16, 2026 |
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