{"id":"CVE-2018-19763","aliases":["DEBIAN-CVE-2018-19763","EUVD-2018-11447","GHSA-6wxx-hhwx-28x6","UBUNTU-CVE-2018-19763"],"status":"published","title":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8...","description":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that will cause a denial of service.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00678,"percentile":0.5265,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2018-11-30T03:00:00Z","modified":"2026-10-24T10:30:15Z","fixes":[{"ecosystem":"Debian:12","package":"libsixel","fixed_in":["1.8.2-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libsixel","fixed_in":["1.8.2-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libsixel","fixed_in":["1.8.2-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-1","1.5.2-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.2-2","1.7.3-1"]}],"products":[{"vendor":"saitoha","product":"libsixel"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1649201","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-19763"},{"url":"https://github.com/advisories/GHSA-6wxx-hhwx-28x6"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-19763","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-19763","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-19763","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-19763","description":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that will cause a denial of service.","status":"published","published":"2018-11-30T03:00:00Z","modified":"2024-09-16T16:33:17.812Z","updated_at":"2026-11-02T14:35:02.966615Z"}],"euvd":[{"id":"EUVD-2018-11447","description":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that will cause a denial of 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service.","status":"published","published":"2018-11-30T03:29:00.61Z","modified":"2026-06-17T01:49:50.343Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:04:49.995593Z"}],"osv":[{"id":"CVE-2018-19763","description":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that will cause a denial of service.","status":"published","published":"2018-11-30T03:29:00.61Z","modified":"2026-10-24T10:30:15.446441001Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:08.834469Z"},{"id":"DEBIAN-CVE-2018-19763","description":"There is a heap-based buffer over-read at writer.c (function: write_png_to_file) in libsixel 1.8.2 that 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