{"id":"CVE-2026-90557","aliases":["DEBIAN-CVE-2026-90557","EUVD-2026-76902","GHSA-m27m-5mqj-h84f","MGASA-2026-0505","UBUNTU-CVE-2026-90557"],"status":"published","title":"Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame","description":"Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in sg_load_player_unit() when processing savegame files with invalid unit activity indices. An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00179,"percentile":0.0757,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-09-12T18:06:41Z","modified":"2026-10-28T11:09:47Z","fixes":[{"ecosystem":"Debian:14","package":"freeciv","fixed_in":["3.2.6+ds-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.6-1","3.0.6-1+deb12u1","3.0.8-1","3.0.8-2","3.1.0+ds-1","3.1.1+ds-1","3.1.2+ds-1","3.1.2+ds-2","3.1.2+ds-2~exp1","3.1.4+ds-1","3.1.4+ds-2","3.2.0+ds-1","3.2.1+ds-1","3.2.1+ds-2","3.2.2+ds-1","3.2.4+ds-1","3.2.5+ds-1","3.2.6+ds-1"]},{"source":"osv","ecosystem":"Debian:13","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.4+ds-2","3.1.4+ds-2+deb13u1","3.2.0+ds-1","3.2.1+ds-1","3.2.1+ds-2","3.2.2+ds-1","3.2.4+ds-1","3.2.5+ds-1","3.2.6+ds-1"]},{"source":"osv","ecosystem":"Debian:14","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.6+ds-1"}]}],"versions":["3.1.4+ds-2","3.2.0+ds-1","3.2.1+ds-1","3.2.1+ds-2","3.2.2+ds-1","3.2.4+ds-1","3.2.5+ds-1"]},{"source":"osv","ecosystem":"Mageia:10","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.6-1.mga10"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.1-1","2.5.2-1","2.5.3-1","2.5.3-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.9-1","2.5.10-1","2.5.10-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.0-3","2.6.0-4","2.6.1-1","2.6.2-1","2.6.2-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.3-1","2.6.5-1","2.6.6-1","2.6.6-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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","3.1.0+ds-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"freeciv","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0+ds-1","3.2.1+ds-1","3.2.1+ds-1build1","3.2.2+ds-1","3.2.4+ds-1"]}],"products":[{"vendor":"freeciv","product":"freeciv"}],"references":[{"url":"https://github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e","tags":["patch","fix","report"]},{"url":"https://github.com/freeciv/freeciv","tags":["product","package","report"]},{"url":"https://redmine.freeciv.org/issues/2162","tags":["issue-tracking","report"]},{"url":"https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108","tags":["technical-description","article","report"]},{"url":"https://github.com/freeciv/freeciv/releases/tag/R3_2_6","tags":["release-notes","advisory","report"]},{"url":"https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282","tags":["technical-description","article","report"]},{"url":"https://www.vulncheck.com/advisories/freeciv-3.1.0-through-3.2.5-out-of-bounds-read-via-savegame","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90557","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m27m-5mqj-h84f"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90557.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-90557","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0505.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36348","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FK3HSTSQRXCELDXHX2YMYSNARDQE5FW3/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-90557","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90557","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-90557","title":"Freeciv 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An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.","status":"published","published":"2026-09-12T18:06:41Z","modified":"2026-09-15T17:08:59Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:28:17.768191Z"}],"ghsa":[{"id":"GHSA-m27m-5mqj-h84f","title":"Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in...","description":"Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in sg_load_player_unit() when processing savegame files with invalid unit activity indices. 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An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.","status":"published","published":"2026-09-12T18:16:00Z","modified":"2026-09-16T11:44:18Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:57:35.676249Z"},{"id":"MGASA-2026-0505","title":"Updated freeciv package fixes security vulnerabilities","description":"Freeciv before 3.2.6 Heap Buffer Overflow via worklist_load.\n(CVE-2026-90556)\nFreeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame.\n(CVE-2026-90557)\n","status":"published","published":"2026-10-14T02:42:28Z","modified":"2026-10-14T02:45:02.970929638Z","updated_at":"2026-11-02T15:49:43.795591Z"}]}}