CVE-2025-9640

EUVD-2025-34611
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 34%
Debian logo
Debian Releases
Debian Product
Codename
samba
bookworm
2:4.17.12+dfsg-0+deb12u4
fixed
bookworm (security)
2:4.17.12+dfsg-0+deb12u4
fixed
bullseye
vulnerable
bullseye (security)
2:4.13.13+dfsg-1~deb11u7
fixed
forky
2:4.24.4+dfsg-1
fixed
sid
2:4.24.4+dfsg-1
fixed
trixie
2:4.22.10+dfsg-0+deb13u1
fixed
trixie (security)
2:4.22.8+dfsg-0+deb13u2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
samba
bionic
Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3
released
focal
Fixed 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm1
released
jammy
Fixed 2:4.15.13+dfsg-0ubuntu1.10
released
noble
Fixed 2:4.19.5+dfsg-4ubuntu9.4
released
plucky
Fixed 2:4.21.4+dfsg-1ubuntu3.5
released
questing
Fixed 2:4.22.3+dfsg-4ubuntu2.1
released
trusty
Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15
released
xenial
Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4
released
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libnetapi
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libnetapi-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libnetapi-devel
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libsmbclient
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libsmbclient-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libsmbclient-devel
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libwbclient
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libwbclient-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
libwbclient-devel
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba-dc
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba-dc-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba-devel
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
python3-samba-test
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-client
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-client-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-client-libs
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-client-libs-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-common
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-common-libs
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-common-libs-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-common-tools
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-common-tools-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-dc-libs
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-dc-libs-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-dcerpc
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-dcerpc-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-debugsource
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-devel
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-krb5-printing
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-krb5-printing-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-ldb-ldap-modules
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-ldb-ldap-modules-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-libs
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-libs-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-pidl
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-test
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-test-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-test-libs
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-test-libs-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-tools
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-usershares
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-vfs-iouring
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-vfs-iouring-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-clients
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-clients-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-krb5-locator
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-krb5-locator-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-modules
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
samba-winbind-modules-debuginfo
Amazon Linux 2023
2:4.17.12-1.amzn2023.0.3
fixed
Common Weakness Enumeration
References
https://access.redhat.com/security/cve/CVE-2025-9640
https://bugzilla.redhat.com/show_bug.cgi?id=2391698
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://lists.debian.org/debian-lts-announce/2025/11/msg00027.html