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

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.

Published: 2025-03-25 Last update: 2026-04-15 Assigner: 74b3a70d-cca6-4d34-9789-e83b222ae3be Source: 74b3a70d-cca6-4d34-9789-e83b222ae3be
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-2312 is rated Low Risk (25.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-2312

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-03 0.07% 0.02% -0.05%
2 2026-04-22 0.01% 0.07% +0.06%
3 2025-03-26 — 0.01% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-2312

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.4 4.0 74b3a70d-cca6-4d34-9789-e83b222ae3be

Weakness enumeration for CVE-2025-2312

OS Trackers for CVE-2025-2312

vendor priority summary link
alpine medium CVE-2025-2312: 1 source package rows (cifs-utils); 15 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 15. https://security.alpinelinux.org/vuln/CVE-2025-2312
debian unimportant CVE-2025-2312 unimportant priority: Debian including 1 source packages (cifs-utils), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2025-2312
redhat medium — https://access.redhat.com/security/cve/CVE-2025-2312
suse medium — https://www.suse.com/security/cve/CVE-2025-2312/
ubuntu medium CVE-2025-2312 medium priority: Ubuntu including 168 source packages (cifs-utils, linux, …), 1646 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1214, released 197, ignored 166, not-affected 45, needed 23, needs-triage 1. https://ubuntu.com/security/CVE-2025-2312

Affected software / configurations for CVE-2025-2312

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-2312

cvelogic Threat Intelligence