CVE-2025-2312

Host Kerberos cache disclosure via namespace confusion

Published Mar 25, 2025 · Updated Mar 25, 2025

Information disclosure in cifs.upcall in Samba Team cifs-utils before 7.2 allows local users to read host Kerberos cache data. In containerized use, cifs.upcall follows the requesting application's namespace instead of the mount namespace when locating a Kerberos credential cache. A container must access a host-mounted CIFS share using Kerberos and trigger a session reconnect; exposure is limited to cache data reached across that namespace boundary.

CVSS severity5.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in cifs.upcall in Samba Team cifs-utils before 7.2 allows local users to read host Kerberos cache data. In containerized use, cifs.upcall follows the requesting application's namespace instead of the mount namespace when locating a Kerberos credential cache. A container must access a host-mounted CIFS share using Kerberos and trigger a session reconnect; exposure is limited to cache data reached across that namespace boundary.

The record

CVE
CVE-2025-2312
Published
Mar 25, 2025
Updated
Mar 25, 2025
Vendor
PPP Project
Product
cifs-utils
Classifications
CWE-488, T1552.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

PPP Project · cifs-utilsversion=0 <7.2

Published CVSS scores

5.9Red Hat CNA-LRCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-488Exposure of Data Element to Wrong Session
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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