{"id":"CVE-2026-90557","title":"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","summary":"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-r…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwe":["CWE-125"],"vendor":"freeciv","product":"freeciv","affected":["freeciv >= 3.1.0 < 3.2.6"],"published":"2026-09-12","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:47.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90557","references":[{"url":"https://github.com/freeciv/freeciv","label":"disclosure@vulncheck.com"},{"url":"https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282","label":"disclosure@vulncheck.com"},{"url":"https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108","label":"disclosure@vulncheck.com"},{"url":"https://github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e","label":"disclosure@vulncheck.com"},{"url":"https://github.com/freeciv/freeciv/releases/tag/R3_2_6","label":"disclosure@vulncheck.com"},{"url":"https://redmine.freeciv.org/issues/2162","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freeciv-3.1.0-through-3.2.5-out-of-bounds-read-via-savegame","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90557.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90557"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90557"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00124,"epssPercentile":0.02473,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T17:08:35.732761Z"},"ingestedAt":"2026-09-14T15:23:07.478Z","slug":"CVE-2026-90557","body":"## Overview\n\nFreeciv 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90557.json)","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}