{"id":"USN-6455-2","summary":"exim4 regression","details":"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","modified":"2026-06-10T18:29:40.119756175Z","published":"2026-06-10T12:22:10Z","related":["UBUNTU-CVE-2023-42117"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6455-2"},{"type":"REPORT","url":"https://launchpad.net/bugs/2152830"}],"affected":[{"package":{"name":"exim4","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=jammy"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"4.95-4ubuntu2.10","binary_name":"exim4"},{"binary_version":"4.95-4ubuntu2.10","binary_name":"exim4-base"},{"binary_version":"4.95-4ubuntu2.10","binary_name":"exim4-config"},{"binary_version":"4.95-4ubuntu2.10","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.95-4ubuntu2.10","binary_name":"exim4-daemon-light"},{"binary_version":"4.95-4ubuntu2.10","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6455-2.json"}}],"schema_version":"1.7.5"}