Buffer Overflow vulnerability in fcitx5 5.0.8 allows attackers to cause a denial of…
Priority LOW 35CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Buffer Overflow vulnerability in fcitx5 5.0.8 allows attackers to cause a denial of service via crafted message to the application's listening port.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00927 60th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fcitx_5_project:fcitx_5:5.0.8:*:*:*:*:*:*:* | 5.0.8 | Vulnerable | Fcitx 5 Project |
- cpe:2.3:a:fcitx_5_project:fcitx_5:5.0.8:*:*:*:*:*:*:* Versions 5.0.8 Vulnerable ·Fcitx 5 Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37311
- 2026-10-03 Alias added: GHSA-2cp5-jwv5-w755
References
Other 1
Sources
- CVE-2021-37311 · CVE Program
- CVE-2021-37311 · NVD
- FIRST EPSS
- GHSA-2cp5-jwv5-w755 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-37311 · Red Hat security data · CC BY 4.0
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