CVE-2026-20339
ClamAV PESpin File Format Processing Integer Overflow Vulnerability
CVE-2026-20339 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
0.0056
46th percentile
integer overflow in the PESpin unpacker leads to undersized allocation and heap out-of-bounds write
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| clamav · Debian 12.15 (bookworm) | 1.4.6+dfsg-0+deb12u1 | DEBIAN-CVE-2026-20339 | Aug 29, 2026 |
| clamav · Debian 14 | 1.4.6+dfsg-1 | DEBIAN-CVE-2026-20339 | 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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