{"id":"UBUNTU-CVE-2018-16648","details":"In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.","modified":"2026-02-04T02:38:05.336969Z","published":"2018-09-06T23:29:00Z","related":["USN-7825-1"],"upstream":["CVE-2018-16648"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-16648"},{"type":"REPORT","url":"https://bugs.ghostscript.com/show_bug.cgi?id=699685"},{"type":"REPORT","url":"https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=38f883fe129a5e89306252a4676eaaf4bc968824"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-16648"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7825-1"}],"affected":[{"package":{"name":"mupdf","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/mupdf@1.12.0+ds1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12.0+ds1-1ubuntu0.1~esm1"}]}],"versions":["1.11+ds1-1.1","1.11+ds1-2","1.12.0+ds1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libmupdf-dev","binary_version":"1.12.0+ds1-1ubuntu0.1~esm1"},{"binary_name":"mupdf","binary_version":"1.12.0+ds1-1ubuntu0.1~esm1"},{"binary_name":"mupdf-tools","binary_version":"1.12.0+ds1-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-16648.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}