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    CVE-2018-16865

    An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges. Versions through v240 are vulnerable.

    Published:Jan 9, 2019
    Last Modified:Jun 9, 2025
    EPS:Jan 11, 2019
    EPSS Score:0.02073
    CVSS Score:7.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Oracle
    Product
    Communications Session Border Controller
    Vendor
    Oracle
    Product
    Enterprise Communications Broker
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Systemd Project
    Product
    Systemd

    Exploits

    https://www.qualys.com/2019/01/09/system-down/system-down.txthttps://www.qualys.com/2019/01/09/system-down/system-down.txt

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    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…
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    References

    http://packetstormsecurity.com/files/152841/System-Down-A-systemd-journald-Exploit.html
    http://seclists.org/fulldisclosure/2019/May/21
    http://www.openwall.com/lists/oss-security/2019/05/10/4
    http://www.openwall.com/lists/oss-security/2021/07/20/2
    http://www.securityfocus.com/bid/106525
    https://access.redhat.com/errata/RHBA-2019:0327
    https://access.redhat.com/errata/RHSA-2019:0049
    https://access.redhat.com/errata/RHSA-2019:0204
    https://access.redhat.com/errata/RHSA-2019:0271
    https://access.redhat.com/errata/RHSA-2019:0342
    https://access.redhat.com/errata/RHSA-2019:0361
    https://access.redhat.com/errata/RHSA-2019:2402
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16865
    https://lists.debian.org/debian-lts-announce/2019/01/msg00016.html
    https://seclists.org/bugtraq/2019/May/25
    https://security.gentoo.org/glsa/201903-07
    https://security.netapp.com/advisory/ntap-20190117-0001/
    https://usn.ubuntu.com/3855-1/
    https://www.debian.org/security/2019/dsa-4367
    https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
    https://www.qualys.com/2019/01/09/system-down/system-down.txt
    http://packetstormsecurity.com/files/152841/System-Down-A-systemd-journald-Exploit.html
    http://seclists.org/fulldisclosure/2019/May/21
    http://www.openwall.com/lists/oss-security/2019/05/10/4
    http://www.openwall.com/lists/oss-security/2021/07/20/2
    http://www.securityfocus.com/bid/106525
    https://access.redhat.com/errata/RHBA-2019:0327
    https://access.redhat.com/errata/RHSA-2019:0049
    https://access.redhat.com/errata/RHSA-2019:0204
    https://access.redhat.com/errata/RHSA-2019:0271
    https://access.redhat.com/errata/RHSA-2019:0342
    https://access.redhat.com/errata/RHSA-2019:0361
    https://access.redhat.com/errata/RHSA-2019:2402
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16865
    https://lists.debian.org/debian-lts-announce/2019/01/msg00016.html
    https://seclists.org/bugtraq/2019/May/25
    https://security.gentoo.org/glsa/201903-07
    https://security.netapp.com/advisory/ntap-20190117-0001/
    https://usn.ubuntu.com/3855-1/
    https://www.debian.org/security/2019/dsa-4367
    https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
    https://www.qualys.com/2019/01/09/system-down/system-down.txt

    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