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    CVE-2015-8025

    driver/subprocs.c in XScreenSaver before 5.34 does not properly perform an internal consistency check, which allows physically proximate attackers to bypass the lock screen by hot swapping monitors.

    Published:Nov 10, 2015
    Last Modified:Apr 12, 2025
    EPS:Nov 10, 2015
    EPSS Score:0.00067
    CVSS Score:2.1

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Xscreensaver Project
    Product
    Xscreensaver

    Exploits

    http://www.openwall.com/lists/oss-security/2015/10/24/2http://www.openwall.com/lists/oss-security/2015/10/24/2

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-updates/2015-11/msg00102.html
    http://www.debian.org/security/2016/dsa-3438
    http://www.openwall.com/lists/oss-security/2015/10/24/2
    http://www.openwall.com/lists/oss-security/2015/10/25/1
    http://www.openwall.com/lists/oss-security/2015/10/29/12
    http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
    http://www.securitytracker.com/id/1034052
    http://www.ubuntu.com/usn/USN-2789-1
    https://twitter.com/Thaolia/status/656823859304398848
    https://www.jwz.org/blog/2015/10/xscreensaver-5-34/
    http://lists.opensuse.org/opensuse-updates/2015-11/msg00102.html
    http://www.debian.org/security/2016/dsa-3438
    http://www.openwall.com/lists/oss-security/2015/10/24/2
    http://www.openwall.com/lists/oss-security/2015/10/25/1
    http://www.openwall.com/lists/oss-security/2015/10/29/12
    http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
    http://www.securitytracker.com/id/1034052
    http://www.ubuntu.com/usn/USN-2789-1
    https://twitter.com/Thaolia/status/656823859304398848
    https://www.jwz.org/blog/2015/10/xscreensaver-5-34/

    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