Description
A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.
This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cisco | ClamAV | 1.4.2, 1.4.1, 1.4.0, 1.3.2, 1.3.1, 1.3.0, 1.2.3, 1.2.2, 1.2.1, 1.2.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | clamav | 1.4.3+dfsg-1 | — |
| Debian 13 | clamav | 1.4.3+dfsg-1 | — |
| Debian 12 | clamav | 1.0.9+dfsg-1~deb12u1 | — |
| Debian 11 | clamav | 1.0.9+dfsg-1~deb11u1 | DLA-4292-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | clamav | 1.4.3+dfsg-0ubuntu1 | — |
| Ubuntu 24.04 LTS | clamav | 1.4.3+dfsg-0ubuntu0.24.04.1 | USN-7615-1 |
| Ubuntu 22.04 LTS | clamav | 1.4.3+dfsg-0ubuntu0.22.04.1 | USN-7615-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | clamav | 1.4.3+dfsg-0ubuntu0.20.04.1+esm1 | USN-7615-2 |
| Ubuntu Pro 18.04 LTS | clamav | No fix yet | — |
| Ubuntu Pro 16.04 LTS | clamav | No fix yet | — |
| Ubuntu Pro 14.04 LTS | clamav | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | clamav | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 |
| SLES 15 SP6 | clamav | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 |
| SLES 15 SP5 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLES 15 SP4 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLES 15 SP3 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | clamav | 1.4.3-3.47.1 | SUSE-SU-2025:02201-1 |
| SLES for SAP 15 SP5 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLES for SAP 15 SP4 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLES for SAP 15 SP3 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLE Micro 5.5 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLE HPC 15 SP5 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLE HPC 15 SP4 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SLE HPC 15 SP3 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SUSE Manager Server 4.3 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SUSE Manager Proxy 4.3 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
| SUSE Enterprise Storage 7.1 | clamav | 1.4.3-150200.8.14.1 | SUSE-SU-2025:02119-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | clamav | 1.4.3-1.1 | openSUSE-SU-2025:15211-1 |
| openSUSE Leap 15.6 | clamav | 1.4.3-150600.18.18.1 | SUSE-SU-2025:02200-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | clamav | 1.4.3-r0 | — |
| Alpine v3.23 | clamav | 1.4.3-r0 | — |
| Alpine v3.22 | clamav | 1.4.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | clamd1.4 +8 | 1.4.3-1.amzn2023.0.1 | ALAS2023-2025-1081 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | clamav | 1.0.9-1 | — |
| Azure Linux 2 (CBL-Mariner) | clamav | 1.0.9-1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 2 repositories
-
keyuraghao/CVE-2025-20260 ★ 0 · Nov 13, 2025
First public PoC for CVE-2025-20260 (CVSS 9.8) - a ClamAV PDF-scanning buffer overflow, with core-dump analysis.
-
Alex-Acero-Security/CVE-2025-20260-POC ★ 0 · Oct 27, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 10
- WID-SEC-2025-1362 ClamAV: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Aug 27, 2026
- USN-7615-1 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-7615-2 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15211-1 clamav-1.4.3-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02200-1 Security update for clamav SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02201-1 Security update for clamav SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02119-1 Security update for clamav SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4292-1 clamav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ALAS2023-2025-1081 Important: clamav1.4 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 10, 2025
- VA-25-171-01 ClamAV CISA ICS & IT advisories · Jun 20, 2025