{"id":"CVE-2020-36120","aliases":["EUVD-2020-23698","GHSA-q23p-6456-4gq5","UBUNTU-CVE-2020-36120"],"status":"published","title":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers...","description":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01241,"percentile":0.69563,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-04-14T13:50:40Z","modified":"2026-10-20T10:54:20Z","affected":[{"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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.2-1","1.8.2-2.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.6-2","1.10.3-2","1.10.3-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.3-3","1.10.3-3build1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.5-1build1","1:1.8.7-r2-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libsixel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.5-1","1.10.5-1build1"]}],"products":[{"vendor":"saitoha","product":"libsixel"}],"references":[{"url":"https://github.com/saitoha/libsixel/issues/143","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36120"},{"url":"https://github.com/advisories/GHSA-q23p-6456-4gq5"},{"url":"https://ubuntu.com/security/CVE-2020-36120","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-36120","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-36120","description":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).","status":"published","published":"2021-04-14T13:50:40Z","modified":"2024-08-04T17:16:14.068Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2020-23698","description":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).","status":"published","published":"2021-04-14T13:50:40Z","modified":"2024-08-04T17:16:14Z","updated_at":"2026-11-03T03:07:04.065361Z"}],"ghsa":[{"id":"GHSA-q23p-6456-4gq5","title":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers...","description":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).","status":"published","published":"2022-05-24T17:47:32Z","modified":"2026-04-24T15:33:25Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T15:07:37.660763Z"}],"nvd":[{"id":"CVE-2020-36120","description":"Buffer Overflow in the \"sixel_encoder_encode_bytes\" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service 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