Every CVE Search/ Get API key

CVE-2026-90557

Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame

6.9 MediumFix available

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

0.18%Up 0.1 points since Sep 14, 2026
90%50%10%1%

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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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 MediumCVSS: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

Affected packages
PackageAffectedFixed
freeciv
Debian: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 less
3.1.1+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
freeciv
Debian: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 less
3.2.2+ds-13.2.4+ds-13.2.5+ds-13.2.6+ds-1
None known
freeciv
Debian: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
freeciv
Mageia:10
From an advisory covering 2 CVEs
before 3.2.6-1.mga10
3.2.6-1.mga10
freeciv
Ubuntu: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
freeciv
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
2.5.9-12.5.10-12.5.10-1ubuntu0.1~esm1
None known
freeciv
Ubuntu: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
freeciv
Ubuntu: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
freeciv
Ubuntu: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
freeciv
Ubuntu: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

History
RecordedChangedSources
affected, facts
first indexedCVE 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

Show 10 moreShow less
MoveEnter Open