CVE-2025-9640
Samba: vfs_streams_xattr uninitialized memory write possible
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-908 |
| Published | Oct 15, 2025 |
| Last Updated | Nov 26, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-9640 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2391698 samba.org: https://www.samba.org/samba/history/security.html openwall.com: http://www.openwall.com/lists/oss-security/2025/10/15/2 openwall.com: http://www.openwall.com/lists/oss-security/2025/10/16/2 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/11/msg00027.html