{"id":"USN-8353-1","summary":"exim4 vulnerability","details":"Warisjeet Singh discovered that Exim with SUPPORT_PROXY enabled did not\nproperly handle memory before SMTP authentication. A remote attacker could\npossibly use this issue to obtain sensitive information.","modified":"2026-06-01T19:14:33.859974809Z","published":"2026-06-01T13:24:28Z","related":["UBUNTU-CVE-2026-48840"],"upstream":["CVE-2026-48840","UBUNTU-CVE-2026-48840"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8353-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-48840"}],"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":"4.95-4ubuntu2.9"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"4.95-4ubuntu2.9","binary_name":"exim4"},{"binary_version":"4.95-4ubuntu2.9","binary_name":"exim4-base"},{"binary_version":"4.95-4ubuntu2.9","binary_name":"exim4-config"},{"binary_version":"4.95-4ubuntu2.9","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.95-4ubuntu2.9","binary_name":"exim4-daemon-light"},{"binary_version":"4.95-4ubuntu2.9","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8353-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-48840","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.97-4ubuntu4.6"}]}],"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","4.97-4ubuntu4.5"],"ecosystem_specific":{"binaries":[{"binary_version":"4.97-4ubuntu4.6","binary_name":"exim4"},{"binary_version":"4.97-4ubuntu4.6","binary_name":"exim4-base"},{"binary_version":"4.97-4ubuntu4.6","binary_name":"exim4-config"},{"binary_version":"4.97-4ubuntu4.6","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.97-4ubuntu4.6","binary_name":"exim4-daemon-light"},{"binary_version":"4.97-4ubuntu4.6","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8353-1.json","cves_map":{"cves":[{"id":"CVE-2026-48840","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"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":"4.98.2-1ubuntu2.3"}]}],"versions":["4.98.1-1ubuntu2","4.98.2-1ubuntu1","4.98.2-1ubuntu2","4.98.2-1ubuntu2.1","4.98.2-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"exim4"},{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"exim4-base"},{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"exim4-config"},{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"exim4-daemon-light"},{"binary_version":"4.98.2-1ubuntu2.3","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8353-1.json","cves_map":{"cves":[{"id":"CVE-2026-48840","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"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":"4.99.1-1ubuntu1.3"}]}],"versions":["4.98.2-1ubuntu2","4.99-4ubuntu1","4.99.1-1ubuntu1","4.99.1-1ubuntu1.1","4.99.1-1ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"exim4"},{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"exim4-base"},{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"exim4-config"},{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"exim4-daemon-light"},{"binary_version":"4.99.1-1ubuntu1.3","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8353-1.json","cves_map":{"cves":[{"id":"CVE-2026-48840","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:26.04:LTS"}}}],"schema_version":"1.7.5"}