A vulnerability in the HTML Cascading Style Sheets (CSS) module 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 improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade clamav | Mar 10, 2026 | Mar 4, 2026 |
| Amazon Linux Ami 2 | — | Upgrade clamav1.4-dataUpgrade clamav1.4-libUpgrade clamav1.4-docUpgrade clamav1.4Upgrade clamav1.4-freshclamUpgrade clamd1.4Upgrade clamav1.4-filesystemUpgrade clamav1.4-debuginfoUpgrade clamav1.4-milterUpgrade clamav1.4-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade clamav1.4-develUpgrade clamav1.4-docUpgrade clamav1.5-debugsourceUpgrade clamav1.5-freshclam-debuginfoUpgrade clamav1.5Upgrade clamav1.5-docUpgrade clamav1.4-freshclamUpgrade clamav1.4-libUpgrade clamd1.5-debuginfoUpgrade clamav1.5-milterUpgrade clamd1.5Upgrade clamav1.5-milter-debuginfoUpgrade clamav1.4-lib-debuginfoUpgrade clamav1.5-libUpgrade clamd1.4Upgrade clamav1.5-develUpgrade clamav1.5-lib-debuginfoUpgrade clamav1.5-freshclamUpgrade clamav1.4-filesystemUpgrade clamav1.4-freshclam-debuginfoUpgrade clamav1.4-milter-debuginfoUpgrade clamav1.5-filesystemUpgrade clamav1.5-debuginfoUpgrade clamav1.4Upgrade clamav1.5-dataUpgrade clamd1.4-debuginfoUpgrade clamav1.4-debuginfoUpgrade clamav1.4-debugsourceUpgrade clamav1.4-milterUpgrade clamav1.4-data | May 4, 2026 | Mar 4, 2026 |
| Ubuntu | — | Upgrade clamav | Apr 28, 2026 | Apr 27, 2026 |
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