# CVE-2026-20213: ClamAV PE File Format Processing Out-of-Bounds Memory Corruption Vulnerability CVE-2026-20213 is fixed in 39 products on 1 platform, first by clamav 1.5.3+dfsg-0ubuntu0.26.04.1, released July 1, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-20213 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0057 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 1, 2026 - Weakness: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20213 ## Description This update for clamav fixes the following issues - CVE-2026-20213: PE file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270107). - CVE-2026-20214: FSG file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270085). - CVE-2026-20215: 7z file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270088). - CVE-2026-20216: InstallShield file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270089). - CVE-2026-20217: PESpin file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270091). - CVE-2026-20243: ALZ file format parser could allow an unauthenticated, remote attacker to cause a denial of service (bsc#1270092). - CVE-2026-20244: DMG file format parser could allow an unauthenticated, remote attacker to cause a denial of service on 32-bit platforms only (bsc#1270106). - CVE-2026-41676: rust-openssl: `Deriver:derive` and `PkeyCtxRef:derive` can overflow short buffers on OpenSSL 1.1.1 (bsc#1270138). Changes for clamav: - update to 1.5.3: * Hardened clamscan, clamdscan, and clamonacc quarantine actions against time-of-check/time-of-use races that could redirect copied, moved, or removed files under unsafe quarantine directory configurations. * Raised the minimum required CMake version to 3.17 to fix Linux builds with libcurl v8.21.0 when linking static library dependencies. * Metadata preclass scans now run before the final scan verdict. * ClamOnAcc: Fixed errors when recursively excluded paths are children of an included path. * ClamOnAcc: Fixed hash bucket list corruption when two watched paths collide in the same bucket. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | clamav Debian 12.15 (bookworm) | 1.4.6+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-20213](https://patchblox.com/security/data/fix/linux/debian-cve-2026-20213.md) | Jul 14, 2026 | | Linux | clamav Debian 14 | 1.4.5+dfsg-1 | [DEBIAN-CVE-2026-20213](https://patchblox.com/security/data/fix/linux/debian-cve-2026-20213.md) | Jul 14, 2026 | | Linux | clamav Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav opensuse-leap 16.0 | 1.5.3-160000.1.1 | [OPENSUSE-SU-2026:21252-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21252-1.md) | Jul 7, 2026 | | Linux | clamav sles 15.6 | 1.5.3-150600.18.28.1 | [SUSE-SU-2026:2835-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2835-1.md) | Jul 9, 2026 | | Linux | clamav sles 15.7 | 1.5.3-150600.18.28.1 | [SUSE-SU-2026:2835-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2835-1.md) | Jul 9, 2026 | | Linux | clamav sles 16.0 | 1.5.3-160000.1.1 | [SUSE-SU-2026:22574-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22574-1.md) | Jul 7, 2026 | | Linux | clamav-base Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-base 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-base-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav-base Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-base 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-base-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav-base Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-base 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-base-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav-daemon Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-daemon 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-daemon-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav-daemon Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-daemon 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-daemon-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav-daemon Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-daemon 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-daemon-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav-docs Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-docs 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-docs-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 21, 2026 | | Linux | clamav-docs Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-docs 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-docs-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 21, 2026 | | Linux | clamav-docs Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-docs 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-docs-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav-freshclam Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-freshclam 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-freshclam-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav-freshclam Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-freshclam 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-freshclam-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav-freshclam Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-freshclam 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-freshclam-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav-milter Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-milter 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-milter-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav-milter Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-milter 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-milter-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav-milter Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-milter 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-milter-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav-testfiles Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamav-testfiles 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamav-testfiles-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamav-testfiles Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamav-testfiles 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamav-testfiles-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamav-testfiles Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamav-testfiles 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamav-testfiles-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | clamav1.4 amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-data amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-debuginfo amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-debugsource amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-devel amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-doc amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-filesystem amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-freshclam amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-freshclam-debuginfo amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-lib amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-lib-debuginfo amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-milter amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.4-milter-debuginfo amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamav1.5 amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-data amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-debuginfo amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-debugsource amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-devel amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-doc amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-filesystem amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-freshclam amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-freshclam-debuginfo amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-lib amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-lib-debuginfo amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-milter amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamav1.5-milter-debuginfo amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamd1.4 amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamd1.4-debuginfo amzn 2023 | 1.4.5-1.amzn2023.0.1 | [ALAS2023-2026-1956](https://patchblox.com/security/data/fix/linux/alas2023-2026-1956.md) | Jul 20, 2026 | | Linux | clamd1.5 amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamd1.5-debuginfo amzn 2023 | 1.5.3-1.amzn2023.0.1 | [ALAS2023-2026-1955](https://patchblox.com/security/data/fix/linux/alas2023-2026-1955.md) | Jul 20, 2026 | | Linux | clamdscan Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [clamdscan 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-clamdscan-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | clamdscan Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [clamdscan 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-clamdscan-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | clamdscan Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [clamdscan 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-clamdscan-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | | Linux | libclamav12 Ubuntu 22.04.1 LTS (jammy) | 1.5.3+dfsg-0ubuntu0.22.04.2 | [libclamav12 1.5.3+dfsg-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libclamav12-1.5.3-dfsg-0ubuntu0.22.04.2.md) | Jul 9, 2026 | | Linux | libclamav12 Ubuntu 24.04.5 LTS (noble) | 1.5.3+dfsg-0ubuntu0.24.04.1 | [libclamav12 1.5.3+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libclamav12-1.5.3-dfsg-0ubuntu0.24.04.1.md) | Jul 9, 2026 | | Linux | libclamav12 Ubuntu 26.04.1 LTS (resolute) | 1.5.3+dfsg-0ubuntu0.26.04.1 | [libclamav12 1.5.3+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libclamav12-1.5.3-dfsg-0ubuntu0.26.04.1.md) | Jul 1, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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