Security readout for executives and security teams
CVE-2025-9640 is a Samba information disclosure issue. An authenticated user may be able to read leftover server memory through alternate data streams. Business impact is mainly confidentiality: exposed memory could contain sensitive data, but sources rate severity as medium and do not indicate active exploitation. Exposure is most relevant where Samba is deployed with vfs_streams_xattr and authenticated users can access shares. The bundle lists Red Hat Enterprise Linux 6 through 10, RHIVOS 1, OpenShift Container Platform 4 rhcos, and Samba package references. Exact upstream affected version ranges are incomplete in the provided data. Treat as a confidentiality risk requiring normal vulnerability management priority. Escalate if Samba shares are broadly accessible, handle sensitive data, or allow many low-privileged users. There is no sourced evidence of active exploitation in the provided material. Mitigation focus: Review Samba and OS vendor advisories for fixed packages or configuration guidance.; Prioritize updates for internet-exposed or broadly accessible Samba services.; Restrict Samba access to trusted users and networks where feasible..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-908: Exact CWE lookup
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Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-9640 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N2.81.4redhatVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineredhat
Made public.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2025-9640CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2391698CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://www.samba.org/samba/history/security.htmlCVE reference, redhat
- https://lists.debian.org/debian-lts-announce/2025/11/msg00027.htmlCVE reference, CVE
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.