{"id":"CVE-2020-23026","aliases":["EUVD-2020-15782","GHSA-gmp4-m7cp-w84v","UBUNTU-CVE-2020-23026"],"status":"published","title":"A NULL pointer dereference in the main() function dhry_1.c of dhrystone 2.1 causes a denial of...","description":"A NULL pointer dereference in the main() function dhry_1.c of dhrystone 2.1 causes 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":0.01074,"percentile":0.65368,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2022-01-03T19:09:26Z","modified":"2026-10-08T12:50:15Z","affected":[{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gcc-3.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.3.6ds1-25ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gcc-4.7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.3-7ubuntu3","4.7.3-8ubuntu1","4.7.3-9ubuntu1","4.7.3-9ubuntu2","4.7.3-10ubuntu1","4.7.3-11ubuntu1","4.7.3-12ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gcc-4.8","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.1-10ubuntu8","4.8.2-1ubuntu1","4.8.2-1ubuntu2","4.8.2-10ubuntu1","4.8.2-10ubuntu2","4.8.2-12ubuntu2","4.8.2-13ubuntu1","4.8.2-14ubuntu1","4.8.2-14ubuntu2","4.8.2-14ubuntu4","4.8.2-15ubuntu3","4.8.2-16ubuntu1","4.8.2-16ubuntu3","4.8.2-16ubuntu4","4.8.2-16ubuntu5","4.8.2-16ubuntu6","4.8.2-17ubuntu1","4.8.2-17ubuntu2","4.8.2-19ubuntu1","4.8.4-2ubuntu1~14.04","4.8.4-2ubuntu1~14.04.1","4.8.4-2ubuntu1~14.04.3","4.8.4-2ubuntu1~14.04.4"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gcc-defaults","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.122ubuntu3","1.124ubuntu2","1.124ubuntu3","1.124ubuntu4","1.124ubuntu5","1.124ubuntu6"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gcc-mingw-w64","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8","9","11","12"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"gccgo-4.9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9-20140213-0ubuntu1","4.9-20140213-0ubuntu2","4.9-20140217-0ubuntu1","4.9-20140222-0ubuntu1","4.9-20140303-0ubuntu2","4.9-20140303-0ubuntu3","4.9-20140321-0ubuntu1","4.9-20140330-0ubuntu1","4.9-20140406-0ubuntu1","4.9.1-0ubuntu1","4.9.3-0ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"gcc-5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1-22ubuntu2","5.2.1-22ubuntu5","5.2.1-23ubuntu1","5.2.1-26ubuntu1","5.2.1-27ubuntu1","5.3.1-2ubuntu2","5.3.1-3ubuntu1","5.3.1-3ubuntu3","5.3.1-4ubuntu1","5.3.1-5ubuntu1","5.3.1-5ubuntu2","5.3.1-5ubuntu3","5.3.1-6ubuntu1","5.3.1-6ubuntu2","5.3.1-7ubuntu1","5.3.1-8ubuntu2","5.3.1-8ubuntu3","5.3.1-9ubuntu3","5.3.1-10ubuntu2","5.3.1-11ubuntu1","5.3.1-12ubuntu1","5.3.1-12ubuntu2","5.3.1-12ubuntu4","5.3.1-13ubuntu1","5.3.1-13ubuntu3","5.3.1-13ubuntu4","5.3.1-13ubuntu6","5.3.1-14ubuntu2","5.3.1-14ubuntu2.1","5.4.0-6ubuntu1~16.04.1","5.4.0-6ubuntu1~16.04.2","5.4.0-6ubuntu1~16.04.4","5.4.0-6ubuntu1~16.04.5","5.4.0-6ubuntu1~16.04.6","5.4.0-6ubuntu1~16.04.9","5.4.0-6ubuntu1~16.04.10","5.4.0-6ubuntu1~16.04.11","5.4.0-6ubuntu1~16.04.12","5.4.0-6ubuntu1~16.04.12+esm2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-5-cross","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12ubuntu1","15ubuntu1","18ubuntu1","20ubuntu3","20ubuntu5","20ubuntu6","24ubuntu0.1","24ubuntu0.2","24ubuntu0.3"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-defaults","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.144ubuntu1","1.146ubuntu8","1.149ubuntu2","1.150ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"gccgo-6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6-20160210-0ubuntu2","6-20160217-0ubuntu1","6-20160220-0ubuntu1","6-20160225-0ubuntu1","6-20160225-0ubuntu2","6-20160227-0ubuntu1","6-20160313-0ubuntu1","6-20160319-0ubuntu1","6-20160405-0ubuntu1","6-20160405-0ubuntu2","6.0.1-0ubuntu1","6.0.1-0ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-3.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.3.6ds1-27.2ubuntu1","1:3.3.6ds1-28ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-4.7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.4-3ubuntu3","4.7.4-3ubuntu7","4.7.4-3ubuntu9","4.7.4-3ubuntu10","4.7.4-3ubuntu11","4.7.4-3ubuntu12"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-4.7-armel-cross","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.86","1.90","3"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-4.7-armhf-cross","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.86","1.87","3"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gcc-4.8","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.5-1ubuntu1","4.8.5-2ubuntu1","4.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