{"id":"USN-8270-1","summary":"exim4 vulnerability","details":"It was discovered that Exim incorrectly handled BDAT body parsing. A remote\nattacker could use this issue to cause Exim to crash, resulting in a denial\nof service, or possibly execute arbitrary code.","modified":"2026-05-20T16:06:19.540251336Z","published":"2026-05-12T14:53:27Z","related":["UBUNTU-CVE-2026-45185"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8270-1"},{"type":"REPORT","url":"https://launchpad.net/bugs/2152202"}],"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":"4.95-4ubuntu2.8"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"4.95-4ubuntu2.8","binary_name":"exim4"},{"binary_version":"4.95-4ubuntu2.8","binary_name":"exim4-base"},{"binary_version":"4.95-4ubuntu2.8","binary_name":"exim4-config"},{"binary_version":"4.95-4ubuntu2.8","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.95-4ubuntu2.8","binary_name":"exim4-daemon-light"},{"binary_version":"4.95-4ubuntu2.8","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8270-1.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.97-4ubuntu4.5"}]}],"versions":["4.96-17ubuntu2","4.96-17ubuntu2.1","4.97-3ubuntu1","4.97-4ubuntu1","4.97-4ubuntu3","4.97-4ubuntu4","4.97-4ubuntu4.1","4.97-4ubuntu4.2","4.97-4ubuntu4.3","4.97-4ubuntu4.4"],"ecosystem_specific":{"binaries":[{"binary_version":"4.97-4ubuntu4.5","binary_name":"exim4"},{"binary_version":"4.97-4ubuntu4.5","binary_name":"exim4-base"},{"binary_version":"4.97-4ubuntu4.5","binary_name":"exim4-config"},{"binary_version":"4.97-4ubuntu4.5","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.97-4ubuntu4.5","binary_name":"exim4-daemon-light"},{"binary_version":"4.97-4ubuntu4.5","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8270-1.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.98.2-1ubuntu2.2"}]}],"versions":["4.98.1-1ubuntu2","4.98.2-1ubuntu1","4.98.2-1ubuntu2","4.98.2-1ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"exim4"},{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"exim4-base"},{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"exim4-config"},{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"exim4-daemon-light"},{"binary_version":"4.98.2-1ubuntu2.2","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8270-1.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:25.10"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.99.1-1ubuntu1.2"}]}],"versions":["4.98.2-1ubuntu2","4.99-4ubuntu1","4.99.1-1ubuntu1","4.99.1-1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"exim4"},{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"exim4-base"},{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"exim4-config"},{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"exim4-daemon-light"},{"binary_version":"4.99.1-1ubuntu1.2","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8270-1.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:26.04:LTS"}}}],"schema_version":"1.7.5"}