# CVE-2025-2312: cifs.upcall makes an upcall to the wrong namespace in containerized environments

> Attackers in containerized environments can access host Kerberos credentials due to incorrect namespace handling in cifs.upcall.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Mar 2025
- **Updated:** 25 Mar 2025
- **Also known as:** AZL-59273, AZL-59284, DEBIAN-CVE-2025-2312, GHSA-c3c3-3xh6-r623, MGASA-2025-0176, OESA-2026-3548, OESA-2026-3549, ROOT-OS-UBUNTU-2204-CVE-2025-2312, SUSE-SU-2025:1381-1, UBUNTU-CVE-2025-2312, USN-7536-1

## What is CVE-2025-2312?

CVE-2025-2312 is a medium-severity vulnerability in cifs-utils, published on 25 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-488 (Exposure of Data Element to Wrong Session)

## Which versions are affected by CVE-2025-2312?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `cifs-utils` | SUSE:Linux Enterprise Micro 5.3 | All versions | 6.15-150400.3.12.1 |
| `cifs-utils` | SUSE:Linux Enterprise Micro 5.4 | All versions | 6.15-150400.3.12.1 |
| `cifs-utils` | SUSE:Linux Enterprise Micro 5.5 | All versions | 6.15-150400.3.12.1 |
| `cifs-utils` | SUSE:Linux Enterprise Module for Basesystem 15 SP6 | All versions | 6.15-150400.3.12.1 |
| `cifs-utils` | openSUSE:Leap 15.6 | All versions | 6.15-150400.3.12.1 |

## How do I fix CVE-2025-2312?

Apply the vendor's patch.

## Is CVE-2025-2312 being exploited?

There is no known exploitation of CVE-2025-2312 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2312 and fix it if it is affected.

What it is: CVE-2025-2312 is a medium-severity vulnerability in cifs-utils, published on 25 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-2312 in the wild and no public exploit code.

Affected product: cifs-utils. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-2312/ (Markdown: https://insights.sbomify.com/CVE-2025-2312/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2312
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2312
- OSV: https://osv.dev/vulnerability/CVE-2025-2312

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-2312/
Summaries are generated and may contain mistakes; the official description above is the record.