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

A vulnerability in the PESpin 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 PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content 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

ProductFixed inFixReleased
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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