XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzmaindexdecoder() was used to decode an Index that contained no Records, the resulting lzmaindex was left in a state where where a subsequent lzmaindex_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.
{
"sources": [
{
"published": "2026-04-02T19:21:33.187Z",
"modified": "2026-04-15T17:33:17.680Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34743",
"id": "CVE-2026-34743",
"imported": "2026-05-07T14:30:18.361Z",
"database_specific": {
"status": "Analyzed"
},
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34743"
}
],
"license": "CC-BY-4.0"
}