CVE-2026-20346
ClamAV PDF File Format Processing Memory Corruption Vulnerability
CVE-2026-20346 is fixed in 39 products on 1 platform, first by clamav 1.5.4+dfsg-0ubuntu0.22.04.1, released August 7, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0054
45th percentile
A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PDF files during scanning, which may result in an out-of-bounds buffer read. 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 cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| clamav · Debian 12.15 (bookworm) | 1.4.6+dfsg-0+deb12u1 | DEBIAN-CVE-2026-20346 | Aug 29, 2026 |
| clamav · Debian 14 | 1.4.6+dfsg-1 | DEBIAN-CVE-2026-20346 | Aug 29, 2026 |
| clamav · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav · opensuse-leap 16.0 | 1.5.4-160000.1.1 | OPENSUSE-SU-2026:21831-1 | Sep 11, 2026 |
| clamav · sles 15.6 | 1.5.4-150600.18.31.1 | SUSE-SU-2026:4180-1 | Sep 14, 2026 |
| clamav · sles 15.7 | 1.5.4-150600.18.31.1 | SUSE-SU-2026:4180-1 | Sep 14, 2026 |
| clamav · sles 16.0 | 1.5.4-160000.1.1 | SUSE-SU-2026:23727-1 | Sep 11, 2026 |
| clamav-base · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-base 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-base · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-base 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-base · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-base 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav-daemon · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-daemon 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-daemon · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-daemon 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-daemon · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-daemon 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav-docs · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-docs 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-docs · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-docs 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-docs · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-docs 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav-freshclam · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-freshclam 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-freshclam · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-freshclam 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-freshclam · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-freshclam 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav-milter · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-milter 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-milter · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-milter 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-milter · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-milter 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav-testfiles · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamav-testfiles 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamav-testfiles · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamav-testfiles 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamav-testfiles · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamav-testfiles 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| clamav1.4 · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-data · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-debuginfo · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-debugsource · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-devel · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-doc · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-filesystem · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-freshclam · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-freshclam-debuginfo · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-lib · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-lib-debuginfo · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-milter · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.4-milter-debuginfo · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamav1.5 · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-data · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-debuginfo · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-debugsource · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-devel · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-doc · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-filesystem · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-freshclam · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-freshclam-debuginfo · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-lib · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-lib-debuginfo · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-milter · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamav1.5-milter-debuginfo · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamd1.4 · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamd1.4-debuginfo · amzn 2023 | 1.4.6-1.amzn2023.0.1 | ALAS2023-2026-2084 | Aug 31, 2026 |
| clamd1.5 · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamd1.5-debuginfo · amzn 2023 | 1.5.4-1.amzn2023.0.1 | ALAS2023-2026-2116 | Aug 31, 2026 |
| clamdscan · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | clamdscan 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| clamdscan · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | clamdscan 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| clamdscan · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | clamdscan 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
| libclamav12 · Ubuntu 22.04.1 LTS (jammy) | 1.5.4+dfsg-0ubuntu0.22.04.1 | libclamav12 1.5.4+dfsg-0ubuntu0.22.04.1 | Aug 7, 2026 |
| libclamav12 · Ubuntu 24.04.5 LTS (noble) | 1.5.4+dfsg-0ubuntu0.24.04.1 | libclamav12 1.5.4+dfsg-0ubuntu0.24.04.1 | Aug 7, 2026 |
| libclamav12 · Ubuntu 26.04.1 LTS (resolute) | 1.5.4+dfsg-0ubuntu0.26.04.1 | libclamav12 1.5.4+dfsg-0ubuntu0.26.04.1 | Aug 7, 2026 |
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