CVE-2025-9640
samba - security update
4.3
MEDIUM
CVSS 3.1
EPSS 0.08%
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.
How to fix CVE-2025-9640
To remediate CVE-2025-9640, upgrade the affected package to a fixed version below.
- —upgrade to 4.21.9-r0 or later
- —upgrade to 2:4.13.13+dfsg-1~deb11u7 or later
- —upgrade to 2:4.13.13+dfsg-1~deb11u7 or later
Is CVE-2025-9640 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 4.21.9-r0
- from 0, < 2:4.13.13+dfsg-1~deb11u7
- from 0, < 2:4.13.13+dfsg-1~deb11u7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |