CVE-2025-9640 · cross-distro fix matrix

CVE-2025-9640: 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.

Affects 4 Linux releases across 4 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-9640 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

samba→ fixed in2:4.13.13+dfsg-1~deb11u7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y samba
```

Debian bookworm

Source: Debian Security Tracker

samba→ fixed in2:4.17.12+dfsg-0+deb12u3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y samba
```

Debian trixie

Source: Debian Security Tracker

samba→ fixed in2:4.22.6+dfsg-0+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y samba
```

Alpine edge

Source: Alpine secdb

samba→ fixed in4.21.9-r0
```
apk update && apk add --upgrade samba
```

Are YOU affected by CVE-2025-9640?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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