cifs.upcall makes an upcall to the wrong namespace in containerized environments
Priority LOW 26CWE-488Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
A flaw was found in cifs-utils. When trying to obtain Kerberos credentials, the cifs.upcall program from the cifs-utils package makes an upcall to the wrong namespace in containerized environments. This issue may lead to disclosing sensitive data from the host's Kerberos credentials cache.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00213 11th percentileScored 2026-11-07
Fix Partial cifs-utils (cifs-utils): 7.2Red Hat: 5 without a fix
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 |
|---|---|---|---|---|---|
| cifs-utils | cifs-utils | before 7.2 | 7.2 | Patch available | CNA |
- cifs-utils Vendorcifs-utils Affected before 7.2 Fixed in 7.2 Patch available CNA
Remediation
- Fix · CNA cifs-utils (cifs-utils) Fixed in 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2025-2312
- 2026-10-03 Alias added: GHSA-c3c3-3xh6-r623
References
Sources
- CVE-2025-2312 · CVE Program
- CVE-2025-2312 · NVD
- FIRST EPSS
- GHSA-c3c3-3xh6-r623 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-2312 · Red Hat security data · CC BY 4.0
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