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CVE-2025-9640
4.3 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): LOW
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): LOW
- Integrity impact (I): NONE
- Availability impact (A): NONE
Samba: vfs_streams_xattr uninitialized memory write possible
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.
References
- https://www.samba.org/samba/history/security.html
- https://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- https://www.samba.org/samba/history/security.html
- https://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- https://www.samba.org/samba/history/security.html
- http://www.openwall.com/lists/oss-security/2025/10/16/2
- http://www.openwall.com/lists/oss-security/2025/10/15/2
- https://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- 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://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- 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
- 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
- https://access.redhat.com/security/cve/CVE-2025-9640 x_refsource_REDHAT vdb-entry
- RHBZ#2391698 issue-tracking x_refsource_REDHAT
- https://www.samba.org/samba/history/security.html
Affected products
rhcos
samba
- <4.23.2
- <4.21.9
- <4.21.5
samba4
Matching in nixpkgs
pkgs.samba
Standard Windows interoperability suite of programs for Linux and Unix
pkgs.samba4
Standard Windows interoperability suite of programs for Linux and Unix
pkgs.sambamba
SAM/BAM processing tool
pkgs.sambaFull
Standard Windows interoperability suite of programs for Linux and Unix
pkgs.samba4Full
Standard Windows interoperability suite of programs for Linux and Unix
Package maintainers
-
@aneeshusa Aneesh Agrawal <aneeshusa@gmail.com>
-
@jbedo Justin Bedő <cu@cua0.org>