{"id":"UBUNTU-CVE-2020-26148","details":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","modified":"2026-04-22T12:35:55.667282Z","published":"2020-09-30T18:15:00Z","upstream":["CVE-2020-26148"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-26148"},{"type":"REPORT","url":"https://github.com/mity/md4c/issues/130"},{"type":"REPORT","url":"https://github.com/mity/md4c/commit/22ca89a3008966c4316d6b0a158b1a49f9038df0"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-26148"}],"affected":[{"package":{"name":"md4c","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/md4c@0.4.3-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.3.4-1","0.4.1-1","0.4.2-1","0.4.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libmd4c0","binary_version":"0.4.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26148.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}