CVE-2026-90557
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
6.9
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
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.
- Record
CVE-2026-90557- CVSS 4.0
- 6.9 Medium
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 - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-76902
6.9
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.
- Record
EUVD-2026-76902- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m27m-5mqj-h84f
6.9
Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in...
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.
- Record
GHSA-m27m-5mqj-h84f- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
NVD
6.9
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.
- Record
CVE-2026-90557- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
6.9
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
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.
- Record
CVE-2026-90557- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-90557
6.9
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.
- Record
DEBIAN-CVE-2026-90557- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-90557
6.9
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.
- Record
UBUNTU-CVE-2026-90557- CVSS 4.0
- 6.9 Medium
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 - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2026-0505 No score
Updated freeciv package fixes security vulnerabilities
Freeciv before 3.2.6 Heap Buffer Overflow via worklist_load. (CVE-2026-90556) Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame. (CVE-2026-90557)
- Record
MGASA-2026-0505- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
freecivDebian:12 |
All versions, plus listed versions 3.0.6-13.0.6-1+deb12u13.0.8-13.0.8-23.1.0+ds-1 Show 13 moreShow less3.1.1+ds-13.1.2+ds-13.1.2+ds-23.1.2+ds-2~exp13.1.4+ds-13.1.4+ds-23.2.0+ds-13.2.1+ds-13.2.1+ds-23.2.2+ds-13.2.4+ds-13.2.5+ds-13.2.6+ds-1 |
None known |
freecivDebian:13 |
All versions, plus listed versions 3.1.4+ds-23.1.4+ds-2+deb13u13.2.0+ds-13.2.1+ds-13.2.1+ds-2 Show 4 moreShow less3.2.2+ds-13.2.4+ds-13.2.5+ds-13.2.6+ds-1 |
None known |
freecivDebian:14 |
before 3.2.6+ds-1, plus listed versions 3.1.4+ds-23.2.0+ds-13.2.1+ds-13.2.1+ds-23.2.2+ds-13.2.4+ds-13.2.5+ds-1 |
3.2.6+ds-1 |
freecivMageia:10 From an advisory covering 2 CVEs |
before 3.2.6-1.mga10 | 3.2.6-1.mga10 |
freecivUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.5.1-12.5.2-12.5.3-12.5.3-1ubuntu0.1~esm1 |
None known |
freecivUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.5.9-12.5.10-12.5.10-1ubuntu0.1~esm1 |
None known |
freecivUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 2.6.0-32.6.0-42.6.1-12.6.2-12.6.2-1ubuntu0.1~esm1 |
None known |
freecivUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 2.6.3-12.6.5-12.6.6-12.6.6-1ubuntu0.1~esm1 |
None known |
freecivUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 3.0.8-13.0.8-23.0.8-2build13.1.0+ds-1build33.1.0+ds-1build43.1.0+ds-1build53.1.0+ds-1ubuntu0.1~esm1 |
None known |
freecivUbuntu:26.04:LTS |
All versions, plus listed versions 3.2.0+ds-13.2.1+ds-13.2.1+ds-1build13.2.2+ds-13.2.4+ds-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-90557 is a medium vulnerability (CVSS 6.9) in Freeciv, published September 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 7th percentile. Fixed in freeciv 3.2.6+ds-1.
References
github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e
github.com/freeciv/freeciv
redmine.freeciv.org/issues/2162
github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c
github.com/freeciv/freeciv/releases/tag/R3_2_6
github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c
Show 10 moreShow less
vulncheck.com/advisories/freeciv-3.1.0-through-3.2.5-out-of-bounds-read-via-savegame
nvd.nist.gov/vuln/detail/CVE-2026-90557
github.com/advisories/GHSA-m27m-5mqj-h84f
github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90557.json
security-tracker.debian.org/tracker/CVE-2026-90557
advisories.mageia.org/MGASA-2026-0505.html
bugs.mageia.org/show_bug.cgi?id=36348
lists.fedoraproject.org/archives/list/[email protected]/message/FK3HSTSQRXCELDXHX2YMYSNARDQE5FW3
ubuntu.com/security/CVE-2026-90557
cve.org/CVERecord?id=CVE-2026-90557