CVE-2025-9640
Samba: vfs_streams_xattr uninitialized memory write possible
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
15 Oct 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
sambaRed Hat · Red Hat Enterprise Linux 10Red Hat · Red Hat Enterprise Linux 6Red Hat · Red Hat Enterprise Linux 7Red Hat · Red Hat Enterprise Linux 8Red Hat · Red Hat Enterprise Linux 9Red Hat · Red Hat In-Vehicle Operating System 1Red Hat · Red Hat OpenShift Container Platform 4Want to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://access.redhat.com/security/cve/CVE-2025-9640https://bugzilla.redhat.com/show_bug.cgi?id=2391698https://lists.debian.org/debian-lts-announce/2025/11/msg00027.htmlhttps://www.samba.org/samba/history/security.htmlhttp://www.openwall.com/lists/oss-security/2025/10/15/2http://www.openwall.com/lists/oss-security/2025/10/16/2