{"id":"AZL-105810","summary":"CVE-2026-103242 affecting package rpm 4.18.2-2","details":"A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.","modified":"2026-10-04T05:34:07Z","published":"2026-09-30T12:17:12Z","upstream":["CVE-2026-103242"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103242"}],"affected":[{"package":{"name":"rpm","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/rpm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.18.2-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105810.json"}}],"schema_version":"1.9.0"}