UBUNTU-CVE-2025-9640

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    UBUNTU-CVE-2025-9640

    Published: 15 Oct 2025Last Modified: 22 Apr 2026
    Upstream:
    CVE-2025-9640

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2025-9640, https://www.cve.org/CVERecord?id=CVE-2025-9640, https://ubuntu.com/security/notices/USN-7826-1, https://ubuntu.com/security/notices/USN-7826-2

    Affected packages

    Package

    Name: samba

    Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15

    Affected versions

    2:3.6.18-1ubuntu3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2025-9640 | CVE-DB