{"id":"USN-6455-2","aliases":[],"status":"published","title":"exim4 regression","description":"USN-6455-1 fixed vulnerabilities in Exim. The fix for CVE-2023-42117\nintroduced a regression on Ubuntu 22.04 LTS that resulted in certain\nconnections logging a Taint mismatch error. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to memory corruption. A remote attacker could\n possibly use this issue to execute arbitrary code. (CVE-2023-42117)\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to an out-of-bounds read. An attacker could possibly\n use this issue to expose sensitive information. (CVE-2023-42119)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-06-10T12:22:10Z","modified":"2026-06-10T18:29:40Z","fixes":[{"ecosystem":"Ubuntu:22.04:LTS","package":"exim4","fixed_in":["4.95-4ubuntu2.10"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"exim4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.95-4ubuntu2.10"}]}],"versions":["4.94.2-7ubuntu2","4.95-2ubuntu2","4.95-4ubuntu1","4.95-4ubuntu2","4.95-4ubuntu2.1","4.95-4ubuntu2.2","4.95-4ubuntu2.3","4.95-4ubuntu2.4","4.95-4ubuntu2.5","4.95-4ubuntu2.6","4.95-4ubuntu2.7","4.95-4ubuntu2.8","4.95-4ubuntu2.9"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-6455-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2152830","tags":["report"]}],"sources":{"osv":[{"id":"USN-6455-2","title":"exim4 regression","description":"USN-6455-1 fixed vulnerabilities in Exim. The fix for CVE-2023-42117\nintroduced a regression on Ubuntu 22.04 LTS that resulted in certain\nconnections logging a Taint mismatch error. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to memory corruption. A remote attacker could\n possibly use this issue to execute arbitrary code. (CVE-2023-42117)\n\n It was discovered that Exim incorrectly handled validation of user-supplied\n data, which could lead to an out-of-bounds read. An attacker could possibly\n use this issue to expose sensitive information. (CVE-2023-42119)\n","status":"published","published":"2026-06-10T12:22:10Z","modified":"2026-06-10T18:29:40.119756175Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}