CVE-2025-9640CWE-908

CVE-2025-9640

Medium · published October 15, 2025

CVSS v3.1
4.3
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00462 · 39.1th percentile
Weakness
CWE-908 · Use of Uninitialized Resource
Published
2025-10-15T17:16Z
References (6)
https://access.redhat.com/security/cve/CVE-2025-9640 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2391698 · [email protected]https://www.samba.org/samba/history/security.html · [email protected]http://www.openwall.com/lists/oss-security/2025/10/15/2 · af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/10/16/2 · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/11/msg00027.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 15 OCT 12:47Z
    Samba: vfs_streams_xattr uninitialized memory write possible
    cvelistv5