Description
A vulnerability in the PDF parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper buffer size tracking that may result in a heap buffer over-read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to crash, resulting in a denial of service condition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cisco | ClamAV | 0.103.0, 0.103.1 | — |
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 | 0.103.2+dfsg-1 | — |
| Debian 13 | clamav | 0.103.2+dfsg-1 | — |
| Debian 12 | clamav | 0.103.2+dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | clamav | 0.103.2+dfsg-0ubuntu0.20.04.1 | USN-4918-1 |
| Ubuntu 18.04 LTS | clamav | 0.103.2+dfsg-0ubuntu0.18.04.1 | USN-4918-1 |
| Ubuntu 16.04 LTS | clamav | 0.103.2+dfsg-0ubuntu0.16.04.1 | USN-4918-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | clamav | 0.103.2+dfsg-0ubuntu0.14.04.1+esm1 | USN-4918-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLES 15 SP1 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLES 15 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLES 12 SP5 | clamav | 0.103.2-3.6.1 | SUSE-SU-2021:1174-1 |
| SLES 12 SP4 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SLES 12 SP2 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SLES 11 SP4 | clamav | 0.103.2-0.20.35.1 | SUSE-SU-2021:14692-1 |
| SLES for SAP 15 SP1 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLES for SAP 15 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLES for SAP 12 SP5 | clamav | 0.103.2-3.6.1 | SUSE-SU-2021:1174-1 |
| SLES for SAP 12 SP4 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SLES for SAP 12 SP3 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SLE HPC 15 SP1 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SLE HPC 15 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SUSE OpenStack Cloud Crowbar 9 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SUSE OpenStack Cloud Crowbar 8 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SUSE OpenStack Cloud 9 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SUSE OpenStack Cloud 8 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SUSE Manager Server 4.0 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SUSE Manager Retail Branch Server 4.0 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SUSE Manager Proxy 4.0 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | clamav | 0.103.2-0.20.35.1 | SUSE-SU-2021:14692-1 |
| SUSE HPE Helion OpenStack 8 | clamav | 0.103.2-33.35.1 | SUSE-SU-2021:1189-1 |
| SUSE Enterprise Storage 6 | clamav | 0.103.2-3.26.1 | SUSE-SU-2021:1190-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | clamav | 0.103.3-1.4 | openSUSE-SU-2024:10685-1 |
| openSUSE Leap 15.2 | clamav | 0.103.2-lp152.6.6.1 | openSUSE-SU-2021:0555-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | clamav | 0.103.2-r0 | — |
| Alpine v3.23 | clamav | 0.103.2-r0 | — |
| Alpine v3.22 | clamav | 0.103.2-r0 | — |
| Alpine v3.21 | clamav | 0.103.2-r0 | — |
| Alpine v3.20 | clamav | 0.103.2-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | clamav | 0.103.2-r0 | — |
| Alpine v3.18 | clamav | 0.103.2-r0 | — |
| Alpine v3.17 | clamav | 0.103.2-r0 | — |
| Alpine v3.16 | clamav | 0.103.2-r0 | — |
| Alpine v3.15 | clamav | 0.103.2-r0 | — |
| Alpine v3.14 | clamav | 0.103.2-r0 | — |
| Alpine v3.13 | clamav | 0.103.2-r0 | — |
| Alpine v3.12 | clamav | 0.103.2-r0 | — |
| Alpine v3.11 | clamav | 0.103.2-r0 | — |
Advisories 8
- USN-4918-2 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4918-1 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2021:1174-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0555-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10685-1 clamav-0.103.3-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1190-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1189-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14692-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026