Vulnerability Description
A flaw was found in Samba, in the vfs_streams_xattr module, where uninitialized heap memory could be written into alternate data streams. This allows an authenticated user to read residual memory content that may include sensitive data, resulting in an information disclosure vulnerability.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2025-9640
- https://bugzilla.redhat.com/show_bug.cgi?id=2391698
- https://www.samba.org/samba/history/security.html
- http://www.openwall.com/lists/oss-security/2025/10/15/2
- http://www.openwall.com/lists/oss-security/2025/10/16/2
- https://lists.debian.org/debian-lts-announce/2025/11/msg00027.html
FAQ
What is CVE-2025-9640?
CVE-2025-9640 is a vulnerability with a CVSS score of 4.3 (MEDIUM). A flaw was found in Samba, in the vfs_streams_xattr module, where uninitialized heap memory could be written into alternate data streams. This allows an authenticated user to read residual memory cont...
How severe is CVE-2025-9640?
CVE-2025-9640 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-9640?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.