CVE-2025-9640
CVE-2025-9640 · Samba: vfs_streams_xattr uninitialized memory write possible
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 4.3 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
red hat enterprise linux 10
No fix published
red hat enterprise linux 6
No fix published
red hat enterprise linux 7
No fix published
red hat enterprise linux 8
No fix published
red hat enterprise linux 9
No fix published
red hat openshift container platform 4
No fix published
samba Debian:12
- Versions
- 2:4.17.10+dfsg-0+deb12u1
- 2:4.17.10+dfsg-0+deb12u1~bpo11+1
- 2:4.17.11+dfsg-0+deb12u1
- 2:4.17.12+dfsg-0+deb12u1
- 2:4.17.12+dfsg-0+deb12u1~bpo11+1
- 2:4.17.12+dfsg-0+deb12u2
- 2:4.17.8+dfsg-2
- 2:4.17.8+dfsg-2.1
- 2:4.17.9+dfsg-0+deb12u1
- 2:4.17.9+dfsg-0+deb12u2
- 2:4.17.9+dfsg-0+deb12u3
- 2:4.17.9+dfsg-0+deb12u3~bpo11+1
- Affected ranges
- ECOSYSTEM: < 2:4.17.12+dfsg-0+deb12u3
Update to 2:4.17.12+dfsg-0+deb12u3
samba Debian:13
- Versions
- 2:4.22.3+dfsg-4
- 2:4.22.4+dfsg-1
- 2:4.22.4+dfsg-1~deb13u1
- 2:4.22.4+dfsg-1~deb13u1~bpo12+1
- 2:4.22.6+dfsg-0+deb13u1~bpo12+1
- Affected ranges
- ECOSYSTEM: < 2:4.22.6+dfsg-0+deb13u1
Update to 2:4.22.6+dfsg-0+deb13u1
samba Debian:14
- Versions
- 2:4.22.3+dfsg-4
- 2:4.22.4+dfsg-1
- 2:4.22.4+dfsg-1~deb13u1
- 2:4.22.4+dfsg-1~deb13u1~bpo12+1
- 2:4.23.0+dfsg-1
- 2:4.23.0+dfsg-2
- 2:4.23.0+dfsg-3
- 2:4.23.0~rc1+dfsg-1
- 2:4.23.0~rc2+dfsg-1
- 2:4.23.0~rc3+dfsg-1
- 2:4.23.1+dfsg-1
- Affected ranges
- ECOSYSTEM: < 2:4.23.2+dfsg-1
Update to 2:4.23.2+dfsg-1
samba Ubuntu:Pro:14.04:LTS
- Versions
- 2:3.6.18-1ubuntu3
- 2:4.0.10+dfsg-4ubuntu2
- 2:4.0.13+dfsg-1ubuntu1
- 2:4.1.3+dfsg-2ubuntu2
- 2:4.1.3+dfsg-2ubuntu3
- 2:4.1.3+dfsg-2ubuntu4
- 2:4.1.3+dfsg-2ubuntu5
- 2:4.1.6+dfsg-1ubuntu1
- 2:4.1.6+dfsg-1ubuntu2
- 2:4.1.6+dfsg-1ubuntu2.14.04.1
- 2:4.1.6+dfsg-1ubuntu2.14.04.2
- 2:4.1.6+dfsg-1ubuntu2.14.04.3
- 2:4.1.6+dfsg-1ubuntu2.14.04.4
- 2:4.1.6+dfsg-1ubuntu2.14.04.5
- 2:4.1.6+dfsg-1ubuntu2.14.04.7
- 2:4.1.6+dfsg-1ubuntu2.14.04.8
- 2:4.1.6+dfsg-1ubuntu2.14.04.9
- 2:4.1.6+dfsg-1ubuntu2.14.04.11
- 2:4.1.6+dfsg-1ubuntu2.14.04.12
- 2:4.1.6+dfsg-1ubuntu2.14.04.13
- 2:4.3.8+dfsg-0ubuntu0.14.04.2
- 2:4.3.9+dfsg-0ubuntu0.14.04.1
- 2:4.3.9+dfsg-0ubuntu0.14.04.3
- 2:4.3.11+dfsg-0ubuntu0.14.04.1
- 2:4.3.11+dfsg-0ubuntu0.14.04.2
- 2:4.3.11+dfsg-0ubuntu0.14.04.3
- 2:4.3.11+dfsg-0ubuntu0.14.04.4
- 2:4.3.11+dfsg-0ubuntu0.14.04.6
- 2:4.3.11+dfsg-0ubuntu0.14.04.7
- 2:4.3.11+dfsg-0ubuntu0.14.04.8
- 2:4.3.11+dfsg-0ubuntu0.14.04.9
- 2:4.3.11+dfsg-0ubuntu0.14.04.10
- 2:4.3.11+dfsg-0ubuntu0.14.04.11
- 2:4.3.11+dfsg-0ubuntu0.14.04.12
- 2:4.3.11+dfsg-0ubuntu0.14.04.13
- 2:4.3.11+dfsg-0ubuntu0.14.04.14
- 2:4.3.11+dfsg-0ubuntu0.14.04.16
- 2:4.3.11+dfsg-0ubuntu0.14.04.17
- 2:4.3.11+dfsg-0ubuntu0.14.04.19
- 2:4.3.11+dfsg-0ubuntu0.14.04.20
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm4
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm8
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm11
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm12
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13
- 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm14
- Affected ranges
- ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15
Update to 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15
samba Ubuntu:Pro:16.04:LTS
- Versions
- 2:4.1.17+dfsg-4ubuntu2
- 2:4.1.20+dfsg-1ubuntu1
- 2:4.1.20+dfsg-1ubuntu2
- 2:4.1.20+dfsg-1ubuntu3
- 2:4.1.20+dfsg-1ubuntu5
- 2:4.3.3+dfsg-1ubuntu1
- 2:4.3.3+dfsg-1ubuntu2
- 2:4.3.3+dfsg-1ubuntu3
- 2:4.3.6+dfsg-1ubuntu1
- 2:4.3.8+dfsg-0ubuntu1
- 2:4.3.9+dfsg-0ubuntu0.16.04.1
- 2:4.3.9+dfsg-0ubuntu0.16.04.2
- 2:4.3.9+dfsg-0ubuntu0.16.04.3
- 2:4.3.11+dfsg-0ubuntu0.16.04.1
- 2:4.3.11+dfsg-0ubuntu0.16.04.3
- 2:4.3.11+dfsg-0ubuntu0.16.04.5
- 2:4.3.11+dfsg-0ubuntu0.16.04.6
- 2:4.3.11+dfsg-0ubuntu0.16.04.7
- 2:4.3.11+dfsg-0ubuntu0.16.04.8
- 2:4.3.11+dfsg-0ubuntu0.16.04.9
- 2:4.3.11+dfsg-0ubuntu0.16.04.10
- 2:4.3.11+dfsg-0ubuntu0.16.04.11
- 2:4.3.11+dfsg-0ubuntu0.16.04.12
- 2:4.3.11+dfsg-0ubuntu0.16.04.13
- 2:4.3.11+dfsg-0ubuntu0.16.04.15
- 2:4.3.11+dfsg-0ubuntu0.16.04.16
- 2:4.3.11+dfsg-0ubuntu0.16.04.17
- 2:4.3.11+dfsg-0ubuntu0.16.04.18
- 2:4.3.11+dfsg-0ubuntu0.16.04.19
- 2:4.3.11+dfsg-0ubuntu0.16.04.20
- 2:4.3.11+dfsg-0ubuntu0.16.04.21
- 2:4.3.11+dfsg-0ubuntu0.16.04.23
- 2:4.3.11+dfsg-0ubuntu0.16.04.24
- 2:4.3.11+dfsg-0ubuntu0.16.04.25
- 2:4.3.11+dfsg-0ubuntu0.16.04.26
- 2:4.3.11+dfsg-0ubuntu0.16.04.27
- 2:4.3.11+dfsg-0ubuntu0.16.04.28
- 2:4.3.11+dfsg-0ubuntu0.16.04.29
- 2:4.3.11+dfsg-0ubuntu0.16.04.30
- 2:4.3.11+dfsg-0ubuntu0.16.04.31
- 2:4.3.11+dfsg-0ubuntu0.16.04.32
- 2:4.3.11+dfsg-0ubuntu0.16.04.34
- 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm1
- 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2
- 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm3
- Affected ranges
- ECOSYSTEM: < 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4
Update to 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4
samba Ubuntu:Pro:18.04:LTS
- Versions
- 2:4.6.7+dfsg-1ubuntu3
- 2:4.7.1+dfsg-1ubuntu1
- 2:4.7.3+dfsg-1ubuntu1
- 2:4.7.4+dfsg-1ubuntu1
- 2:4.7.6+dfsg~ubuntu-0ubuntu1
- 2:4.7.6+dfsg~ubuntu-0ubuntu2
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.4
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.5
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.6
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.7
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.9
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.10
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.11
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.13
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.15
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.16
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.17
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.18
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.19
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.20
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.21
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.23
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.24
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.26
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.27
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.28
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.29
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1
- 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm2
- Affected ranges
- ECOSYSTEM: < 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3
Update to 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3
samba Ubuntu:Pro:20.04:LTS
- Versions
- 2:4.10.7+dfsg-0ubuntu2
- 2:4.10.7+dfsg-0ubuntu3
- 2:4.11.1+dfsg-3ubuntu1
- 2:4.11.1+dfsg-3ubuntu2
- 2:4.11.1+dfsg-3ubuntu4
- 2:4.11.5+dfsg-1ubuntu1
- 2:4.11.5+dfsg-1ubuntu2
- 2:4.11.6+dfsg-0ubuntu1
- 2:4.11.6+dfsg-0ubuntu1.1
- 2:4.11.6+dfsg-0ubuntu1.2
- 2:4.11.6+dfsg-0ubuntu1.3
- 2:4.11.6+dfsg-0ubuntu1.4
- 2:4.11.6+dfsg-0ubuntu1.5
- 2:4.11.6+dfsg-0ubuntu1.6
- 2:4.11.6+dfsg-0ubuntu1.8
- 2:4.11.6+dfsg-0ubuntu1.9
- 2:4.11.6+dfsg-0ubuntu1.10
- 2:4.13.14+dfsg-0ubuntu0.20.04.1
- 2:4.13.14+dfsg-0ubuntu0.20.04.2
- 2:4.13.14+dfsg-0ubuntu0.20.04.3
- 2:4.13.14+dfsg-0ubuntu0.20.04.4
- 2:4.13.17~dfsg-0ubuntu0.21.04.1
- 2:4.13.17~dfsg-0ubuntu0.21.04.2
- 2:4.13.17~dfsg-0ubuntu1.20.04.1
- 2:4.13.17~dfsg-0ubuntu1.20.04.2
- 2:4.13.17~dfsg-0ubuntu1.20.04.4
- 2:4.13.17~dfsg-0ubuntu1.20.04.5
- 2:4.15.13+dfsg-0ubuntu0.20.04.1
- 2:4.15.13+dfsg-0ubuntu0.20.04.2
- 2:4.15.13+dfsg-0ubuntu0.20.04.3
- 2:4.15.13+dfsg-0ubuntu0.20.04.4
- 2:4.15.13+dfsg-0ubuntu0.20.04.5
- 2:4.15.13+dfsg-0ubuntu0.20.04.6
- 2:4.15.13+dfsg-0ubuntu0.20.04.7
- 2:4.15.13+dfsg-0ubuntu0.20.04.8
- Affected ranges
- ECOSYSTEM: < 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm1
Update to 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm1
samba Ubuntu:22.04:LTS
- Versions
- 2:4.13.5+dfsg-2ubuntu2
- 2:4.13.5+dfsg-2ubuntu3
- 2:4.13.14+dfsg-0ubuntu1
- 2:4.13.14+dfsg-0ubuntu2
- 2:4.15.5~dfsg-0ubuntu1
- 2:4.15.5~dfsg-0ubuntu2
- 2:4.15.5~dfsg-0ubuntu4
- 2:4.15.5~dfsg-0ubuntu5
- 2:4.15.5~dfsg-0ubuntu5.1
- 2:4.15.9+dfsg-0ubuntu0.2
- 2:4.15.9+dfsg-0ubuntu0.3
- 2:4.15.13+dfsg-0ubuntu1
- 2:4.15.13+dfsg-0ubuntu1.1
- 2:4.15.13+dfsg-0ubuntu1.2
- 2:4.15.13+dfsg-0ubuntu1.3
- 2:4.15.13+dfsg-0ubuntu1.4
- 2:4.15.13+dfsg-0ubuntu1.5
- 2:4.15.13+dfsg-0ubuntu1.6
- 2:4.15.13+dfsg-0ubuntu1.7
- 2:4.15.13+dfsg-0ubuntu1.8
- 2:4.15.13+dfsg-0ubuntu1.9
- Affected ranges
- ECOSYSTEM: < 2:4.15.13+dfsg-0ubuntu1.10
Update to 2:4.15.13+dfsg-0ubuntu1.10
samba Ubuntu:24.04:LTS
- Versions
- 2:4.18.6+dfsg-1ubuntu2
- 2:4.18.6+dfsg-1ubuntu2.1
- 2:4.18.6+dfsg-1ubuntu2.2
- 2:4.19.4+dfsg-3ubuntu1
- 2:4.19.5+dfsg-1ubuntu1
- 2:4.19.5+dfsg-4ubuntu7
- 2:4.19.5+dfsg-4ubuntu8
- 2:4.19.5+dfsg-4ubuntu9
- 2:4.19.5+dfsg-4ubuntu9.2
- 2:4.19.5+dfsg-4ubuntu9.3
- Affected ranges
- ECOSYSTEM: < 2:4.19.5+dfsg-4ubuntu9.4
Update to 2:4.19.5+dfsg-4ubuntu9.4
samba Ubuntu:25.10
- Versions
- 2:4.21.4+dfsg-1ubuntu3
- 2:4.21.4+dfsg-1ubuntu4
- 2:4.21.4+dfsg-1ubuntu5
- 2:4.22.2+dfsg-1ubuntu1
- 2:4.22.3+dfsg-4ubuntu1
- 2:4.22.3+dfsg-4ubuntu2
- Affected ranges
- ECOSYSTEM: < 2:4.22.3+dfsg-4ubuntu2.1
Update to 2:4.22.3+dfsg-4ubuntu2.1
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2025-9640