{"id":"DEBIAN-CVE-2026-34743","details":"XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.","modified":"2026-09-01T16:06:40.300960096Z","published":"2026-04-02T19:21:33.187Z","upstream":["CVE-2026-34743"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-34743"}],"affected":[{"package":{"name":"xz-utils","ecosystem":"Debian:12","purl":"pkg:deb/debian/xz-utils?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.1-1+deb12u1"}]}],"versions":["5.4.1-0.2","5.4.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34743.json"}},{"package":{"name":"xz-utils","ecosystem":"Debian:13","purl":"pkg:deb/debian/xz-utils?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.8.1-1+deb13u1"}]}],"versions":["5.8.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34743.json"}},{"package":{"name":"xz-utils","ecosystem":"Debian:14","purl":"pkg:deb/debian/xz-utils?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.8.3-1"}]}],"versions":["5.8.1-1","5.8.1-1.1","5.8.1-2","5.8.2-1","5.8.2-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34743.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}