In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4…
Priority LOW 34Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs
Why it matters now
EPSS 0.0087 59th percentileScored 2026-11-07
Fix Fixed GitLab Runner (GitLab): 14.3.4, 14.4.2, 14.5.2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| GitLab | GitLab Runner | before 14.3.4; 14.4 to before 14.4.2; 14.5 to before 14.5.2 | 14.3.4, 14.4.2, 14.5.2 | Patch available | CNA |
- GitLab Runner VendorGitLab Affected before 14.3.4; 14.4 to before 14.4.2; 14.5 to before 14.5.2 Fixed in 14.3.4, 14.4.2, 14.5.2 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:* | before 14.3.4; 14.4.0 to before 14.4.2; 14.5.0 to before 14.5.2 | Vulnerable | GitLab |
- cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:* Versions before 14.3.4; 14.4.0 to before 14.4.2; 14.5.0 to before 14.5.2 Vulnerable ·GitLab
Remediation
- Fix · CNA GitLab Runner (GitLab) Fixed in 14.3.4, 14.4.2, 14.5.2
Timeline
- 2026-10-02 Threatist record created from CVE-2021-39947
- 2026-10-03 Alias added: GHSA-hwx9-v7rw-v3qm
References
Sources
- CVE-2021-39947 · CVE Program
- CVE-2021-39947 · NVD
- FIRST EPSS
- GHSA-hwx9-v7rw-v3qm · GitHub Advisory Database · CC BY 4.0
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