The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to…
Priority LOW 37CWE-20Published · 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
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.
Why it matters now
EPSS 0.022 82nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Virtualization 3
Timeline
- 2026-10-02 Threatist record created from CVE-2016-4456
- 2026-10-03 Alias added: GHSA-f425-wv72-9hrq
References
More Gnutls vulnerabilities
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
- TI-2026-03321 Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison CVSS 3.1HIGH 7.4
- TI-2024-00525 Gnutls: rejects certificate chain with distributed trust CVSS 3.1HIGH 7.5
- TI-2023-00345 Observable discrepancy in gnutls CVSS 3.1HIGH 7.4
- TI-2019-02841 Use after free in gnutls CVSS 3.0HIGH 7.5
- TI-2017-03378 Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2016-4456 · CVE Program
- CVE-2016-4456 · NVD
- FIRST EPSS
- GHSA-f425-wv72-9hrq · GitHub Advisory Database · CC BY 4.0
- CVE-2016-4456 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences