{"id":"USN-8754-1","summary":"freeciv vulnerability","details":"It was discovered that Freeciv incorrectly handled certain network packets,\nresulting in a stack overflow. A remote attacker could possibly use this\nissue to cause Freeciv clients or servers to crash, resulting in a denial\nof service.","modified":"2026-09-14T22:12:16.367252549Z","published":"2026-09-14T12:40:26Z","related":["UBUNTU-CVE-2026-33250"],"upstream":["CVE-2026-33250","UBUNTU-CVE-2026-33250"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8754-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33250"}],"affected":[{"package":{"name":"freeciv","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.3-1ubuntu0.1~esm1"}]}],"versions":["2.5.1-1","2.5.2-1","2.5.3-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.3-1ubuntu0.1~esm1","binary_name":"freeciv"},{"binary_name":"freeciv-client-extras","binary_version":"2.5.3-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-gtk","binary_version":"2.5.3-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-qt","binary_version":"2.5.3-1ubuntu0.1~esm1"},{"binary_version":"2.5.3-1ubuntu0.1~esm1","binary_name":"freeciv-client-sdl"},{"binary_name":"freeciv-data","binary_version":"2.5.3-1ubuntu0.1~esm1"},{"binary_name":"freeciv-server","binary_version":"2.5.3-1ubuntu0.1~esm1"},{"binary_name":"freeciv-sound-standard","binary_version":"2.5.3-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-33250","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"}},{"package":{"name":"freeciv","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.10-1ubuntu0.1~esm1"}]}],"versions":["2.5.9-1","2.5.10-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"freeciv","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-extras","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-gtk","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_version":"2.5.10-1ubuntu0.1~esm1","binary_name":"freeciv-client-gtk3"},{"binary_name":"freeciv-client-qt","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-sdl","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-data","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-server","binary_version":"2.5.10-1ubuntu0.1~esm1"},{"binary_name":"freeciv-sound-standard","binary_version":"2.5.10-1ubuntu0.1~esm1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-33250","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"}},{"package":{"name":"freeciv","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.2-1ubuntu0.1~esm1"}]}],"versions":["2.6.0-3","2.6.0-4","2.6.1-1","2.6.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"freeciv","binary_version":"2.6.2-1ubuntu0.1~esm1"},{"binary_version":"2.6.2-1ubuntu0.1~esm1","binary_name":"freeciv-client-extras"},{"binary_name":"freeciv-client-gtk","binary_version":"2.6.2-1ubuntu0.1~esm1"},{"binary_version":"2.6.2-1ubuntu0.1~esm1","binary_name":"freeciv-client-gtk3"},{"binary_version":"2.6.2-1ubuntu0.1~esm1","binary_name":"freeciv-client-qt"},{"binary_name":"freeciv-client-sdl","binary_version":"2.6.2-1ubuntu0.1~esm1"},{"binary_name":"freeciv-data","binary_version":"2.6.2-1ubuntu0.1~esm1"},{"binary_name":"freeciv-server","binary_version":"2.6.2-1ubuntu0.1~esm1"},{"binary_name":"freeciv-sound-standard","binary_version":"2.6.2-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2026-33250","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"}},{"package":{"name":"freeciv","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.6-1ubuntu0.1~esm1"}]}],"versions":["2.6.3-1","2.6.5-1","2.6.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"freeciv","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-extras","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-gtk","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-gtk3","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_version":"2.6.6-1ubuntu0.1~esm1","binary_name":"freeciv-client-qt"},{"binary_name":"freeciv-client-sdl","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-data","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-server","binary_version":"2.6.6-1ubuntu0.1~esm1"},{"binary_name":"freeciv-sound-standard","binary_version":"2.6.6-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:22.04:LTS","cves":[{"id":"CVE-2026-33250","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"}},{"package":{"name":"freeciv","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.0+ds-1ubuntu0.1~esm1"}]}],"versions":["3.0.8-1","3.0.8-2","3.0.8-2build1","3.1.0+ds-1build3","3.1.0+ds-1build4","3.1.0+ds-1build5"],"ecosystem_specific":{"binaries":[{"binary_name":"freeciv","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"},{"binary_version":"3.1.0+ds-1ubuntu0.1~esm1","binary_name":"freeciv-client-extras"},{"binary_name":"freeciv-client-gtk3","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-qt","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"},{"binary_name":"freeciv-client-sdl","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"},{"binary_version":"3.1.0+ds-1ubuntu0.1~esm1","binary_name":"freeciv-data"},{"binary_name":"freeciv-ruleset-tools","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"},{"binary_name":"freeciv-server","binary_version":"3.1.0+ds-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-33250","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"}}],"schema_version":"1.9.0"}