{"id":"UBUNTU-CVE-2026-16517","details":"A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.","modified":"2026-07-29T10:18:11.663054512Z","published":"2026-07-21T23:17:00Z","upstream":["CVE-2026-16517"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-16517"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-16517"}],"affected":[{"package":{"name":"libarchive","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-5ubuntu1","3.1.2-7ubuntu1","3.1.2-7ubuntu2","3.1.2-7ubuntu2.1","3.1.2-7ubuntu2.2","3.1.2-7ubuntu2.3","3.1.2-7ubuntu2.4","3.1.2-7ubuntu2.6","3.1.2-7ubuntu2.7","3.1.2-7ubuntu2.8","3.1.2-7ubuntu2.8+esm1","3.1.2-7ubuntu2.8+esm3","3.1.2-7ubuntu2.8+esm4","3.1.2-7ubuntu2.8+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.2-7ubuntu2.8+esm5","binary_name":"bsdcpio"},{"binary_name":"bsdtar","binary_version":"3.1.2-7ubuntu2.8+esm5"},{"binary_name":"libarchive13","binary_version":"3.1.2-7ubuntu2.8+esm5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-11build1","3.1.2-11ubuntu0.16.04.1","3.1.2-11ubuntu0.16.04.2","3.1.2-11ubuntu0.16.04.3","3.1.2-11ubuntu0.16.04.4","3.1.2-11ubuntu0.16.04.5","3.1.2-11ubuntu0.16.04.6","3.1.2-11ubuntu0.16.04.7","3.1.2-11ubuntu0.16.04.8","3.1.2-11ubuntu0.16.04.8+esm1","3.1.2-11ubuntu0.16.04.8+esm2","3.1.2-11ubuntu0.16.04.8+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"bsdcpio","binary_version":"3.1.2-11ubuntu0.16.04.8+esm3"},{"binary_name":"bsdtar","binary_version":"3.1.2-11ubuntu0.16.04.8+esm3"},{"binary_name":"libarchive13","binary_version":"3.1.2-11ubuntu0.16.04.8+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.2-3.1","3.2.2-3.1ubuntu0.1","3.2.2-3.1ubuntu0.2","3.2.2-3.1ubuntu0.3","3.2.2-3.1ubuntu0.4","3.2.2-3.1ubuntu0.5","3.2.2-3.1ubuntu0.6","3.2.2-3.1ubuntu0.7","3.2.2-3.1ubuntu0.7+esm1","3.2.2-3.1ubuntu0.7+esm2","3.2.2-3.1ubuntu0.7+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2.2-3.1ubuntu0.7+esm3","binary_name":"bsdcpio"},{"binary_name":"bsdtar","binary_version":"3.2.2-3.1ubuntu0.7+esm3"},{"binary_name":"libarchive-tools","binary_version":"3.2.2-3.1ubuntu0.7+esm3"},{"binary_name":"libarchive13","binary_version":"3.2.2-3.1ubuntu0.7+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.0-1","3.4.0-1build1","3.4.0-1ubuntu2","3.4.0-2ubuntu1","3.4.0-2ubuntu1.1","3.4.0-2ubuntu1.2","3.4.0-2ubuntu1.3","3.4.0-2ubuntu1.4","3.4.0-2ubuntu1.5","3.4.0-2ubuntu1.5+esm1","3.4.0-2ubuntu1.5+esm2","3.4.0-2ubuntu1.5+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"libarchive-tools","binary_version":"3.4.0-2ubuntu1.5+esm3"},{"binary_name":"libarchive13","binary_version":"3.4.0-2ubuntu1.5+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.3-2","3.4.3-2build1","3.5.2-1","3.5.2-1ubuntu1","3.6.0-1ubuntu1","3.6.0-1ubuntu1.1","3.6.0-1ubuntu1.2","3.6.0-1ubuntu1.3","3.6.0-1ubuntu1.4","3.6.0-1ubuntu1.5","3.6.0-1ubuntu1.6","3.6.0-1ubuntu1.7","3.6.0-1ubuntu1.8"],"ecosystem_specific":{"binaries":[{"binary_name":"libarchive-tools","binary_version":"3.6.0-1ubuntu1.8"},{"binary_name":"libarchive13","binary_version":"3.6.0-1ubuntu1.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-1ubuntu1","3.7.2-1ubuntu1","3.7.2-1ubuntu2","3.7.2-1.1ubuntu2","3.7.2-2","3.7.2-2ubuntu0.1","3.7.2-2ubuntu0.2","3.7.2-2ubuntu0.3","3.7.2-2ubuntu0.4","3.7.2-2ubuntu0.5","3.7.2-2ubuntu0.6","3.7.2-2ubuntu0.7","3.7.2-2ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_name":"libarchive-tools","binary_version":"3.7.2-2ubuntu0.8"},{"binary_name":"libarchive13t64","binary_version":"3.7.2-2ubuntu0.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}},{"package":{"name":"libarchive","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libarchive?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.7-0ubuntu3","3.8.5-1ubuntu1","3.8.5-1ubuntu2","3.8.5-1ubuntu2.1","3.8.5-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.8.5-1ubuntu2.2","binary_name":"libarchive-tools"},{"binary_version":"3.8.5-1ubuntu2.2","binary_name":"libarchive13t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}