Description
On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in CHM file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional information becomes available.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cisco | Cisco AMP for Endpoints | — | — |
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 | 0.103.6+dfsg-1 | — |
| Debian 13 | clamav | 0.103.6+dfsg-1 | — |
| Debian 12 | clamav | 0.103.6+dfsg-1 | — |
| Debian 9 | clamav | 0.103.6+dfsg-0+deb9u1 | DLA-3042-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | clamav | 0.103.6+dfsg-0ubuntu0.22.04.1 | USN-5423-1 |
| Ubuntu 20.04 LTS | clamav | 0.103.6+dfsg-0ubuntu0.20.04.1 | USN-5423-1 |
| Ubuntu 18.04 LTS | clamav | 0.103.6+dfsg-0ubuntu0.18.04.1 | USN-5423-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | clamav | 0.103.6+dfsg-0ubuntu0.16.04.1+esm1 | USN-5423-2 |
| Ubuntu Pro 14.04 LTS | clamav | 0.103.6+dfsg-0ubuntu0.14.04.1+esm1 | USN-5423-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | clamav | 0.103.6-150000.3.38.1 | SUSE-SU-2022:1644-1 |
| SLES 15 SP3 | clamav | 0.103.6-150000.3.38.1 | SUSE-SU-2022:1644-1 |
| SLES 12 SP5 | clamav | 0.103.6-3.18.1 | SUSE-SU-2022:1647-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | clamav | 0.103.6-3.18.1 | SUSE-SU-2022:1647-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | clamav | 0.103.6-1.1 | openSUSE-SU-2024:12047-1 |
| openSUSE Leap 15.4 | clamav | 0.103.6-150000.3.38.1 | SUSE-SU-2022:1644-1 |
| openSUSE Leap 15.3 | clamav | 0.103.6-150000.3.38.1 | SUSE-SU-2022:1644-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.13 | clamav | 0.103.6-r0 | — |
| Alpine v3.12 | clamav | 0.103.6-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | clamd +7 | 0.103.7-1.amzn2023.0.3 | ALAS2023-2023-052 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | clamav | 0.105.0-1 | — |
Advisories 7
- USN-5423-2 clamav vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5423-1 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-3042-1 clamav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:12047-1 clamav-0.103.6-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1644-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1647-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2023-052 Important: clamav security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 22, 2023
References
- 20220504 ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022 vendor-advisory
- FEDORA-2022-b8691af27b vendor-advisory
- FEDORA-2022-0ac71a8f3a vendor-advisory
- FEDORA-2022-a910a41a17 vendor-advisory
- [debian-lts-announce] 20220603 [SECURITY] [DLA 3042-1] clamav security update mailing-list
- GLSA-202310-01 vendor-advisory