CVE-2026-20031
clamav: This update for clamav fixes the following issues: Update to clamav 1.5.2: Security issue: - CVE-2026-20031: impro...
CVE-2026-20031 is fixed in 51 products on 1 platform, first by clamav 1.4.4+dfsg-0ubuntu0.22.04.1, released March 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.3
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0047
40th percentile
This update for clamav fixes the following issues: Update to clamav 1.5.2: Security issue: - CVE-2026-20031: improper error handling in the HTML CSS module when splitting UTF-8 strings can lead to denial of service conditions via a crafted HTML file (bsc#1259207). Non security issue: - Support transactional updates (jsc#PED-14819). Changelog: * Fixed a possible infinite loop when scanning some JPEG files by upgrading affected ClamAV dependency, a Rust image library. * The CVD verification process will now ignore certificate files in the CVD certs directory when the user lacks read permissions. * Freshclam: Fix CLD verification bug with PrivateMirror option. * Upgraded the Rust bytes dependency to a newer version to resolve RUSTSEC-2026-0007 advisory. * Fixed a possible crash caused by invalid pointer alignment on some platforms. * Minimal required Rust version is now 1.87.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| clamav · Debian 12.15 (bookworm) | 1.4.6+dfsg-0+deb12u1 | DEBIAN-CVE-2026-20031 | Mar 4, 2026 |
| clamav · Debian 14 | 1.4.4+dfsg-1 | DEBIAN-CVE-2026-20031 | Mar 4, 2026 |
| clamav · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav · opensuse-leap 15.6 | 1.5.2-150600.18.25.1 | SUSE-SU-2026:1325-1 | Apr 14, 2026 |
| clamav · opensuse-leap 16.0 | 1.5.2-160000.1.1 | OPENSUSE-SU-2026:20479-1 | Apr 20, 2026 |
| clamav · sles 15.6 | 1.5.2-150600.18.25.1 | SUSE-SU-2026:1325-1 | Apr 14, 2026 |
| clamav · sles 15.7 | 1.5.2-150600.18.25.1 | SUSE-SU-2026:1325-1 | Apr 14, 2026 |
| clamav-base · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-base 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-base · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-base 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-base · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-base 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-base · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-base 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav-daemon · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-daemon 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-daemon · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-daemon 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-daemon · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-daemon 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-daemon · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-daemon 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav-data · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-debuginfo · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-debugsource · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-devel · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-doc · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-docs · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-docs 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-docs · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-docs 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-docs · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-docs 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-docs · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-docs 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav-filesystem · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-freshclam · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-freshclam · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-freshclam 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-freshclam · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-freshclam 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-freshclam · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-freshclam 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-freshclam · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-freshclam 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav-freshclam-debuginfo · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-lib · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-lib-debuginfo · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-milter · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-milter · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-milter 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-milter · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-milter 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-milter · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-milter 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-milter · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-milter 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav-milter-debuginfo · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamav-testfiles · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamav-testfiles 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamav-testfiles · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamav-testfiles 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamav-testfiles · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamav-testfiles 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamav-testfiles · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamav-testfiles 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| clamav1.4 · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-data · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-debuginfo · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-debugsource · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-devel · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-doc · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-filesystem · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-freshclam · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-freshclam-debuginfo · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-lib · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-lib-debuginfo · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-milter · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.4-milter-debuginfo · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamav1.5 · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-data · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-debuginfo · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-debugsource · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-devel · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-doc · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-filesystem · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-freshclam · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-freshclam-debuginfo · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-lib · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-lib-debuginfo · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-milter · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamav1.5-milter-debuginfo · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamd · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamd-debuginfo · Fedora 43 | 1.4.6-1.fc43 | FEDORA-2026-A9BEEC8485 | Aug 10, 2026 |
| clamd1.4 · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamd1.4-debuginfo · amzn 2023 | 1.4.4-1.amzn2023.0.1 | ALAS2023-2026-1630 | Apr 27, 2026 |
| clamd1.5 · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamd1.5-debuginfo · amzn 2023 | 1.5.2-1.amzn2023.0.1 | ALAS2023-2026-1631 | Apr 27, 2026 |
| clamdscan · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | clamdscan 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| clamdscan · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | clamdscan 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| clamdscan · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | clamdscan 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| clamdscan · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | clamdscan 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
| libclamav12 · Ubuntu 22.04.1 LTS (jammy) | 1.4.4+dfsg-0ubuntu0.22.04.1 | libclamav12 1.4.4+dfsg-0ubuntu0.22.04.1 | Mar 4, 2026 |
| libclamav12 · Ubuntu 24.04.5 LTS (noble) | 1.4.4+dfsg-0ubuntu0.24.04.1 | libclamav12 1.4.4+dfsg-0ubuntu0.24.04.1 | Mar 4, 2026 |
| libclamav12 · Ubuntu 25.10 (questing) | 1.4.4+dfsg-0ubuntu0.25.10.1 | libclamav12 1.4.4+dfsg-0ubuntu0.25.10.1 | Mar 4, 2026 |
| libclamav12 · Ubuntu 26.04.1 LTS (resolute) | 1.4.4+dfsg-0ubuntu0.26.04.1 | libclamav12 1.4.4+dfsg-0ubuntu0.26.04.1 | Mar 4, 2026 |
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