Security readout for executives and security teams
Plain-English summary
CVE-2018-16864 is a local systemd-journald flaw where uncontrolled memory allocation can trigger a stack clash. A local attacker, or local code, could crash journald or potentially gain higher privileges on vulnerable Linux systems.
Executive priority
Treat this as a high-priority Linux fleet hygiene issue, not an internet-scale emergency. Patch vulnerable systems where local users or workloads exist, and include appliances whose vendors disclosed exposure.
Technical view
The issue affects The systemd Project systemd through v240. When a program with very long command-line arguments calls syslog, systemd-journald can allocate memory without proper limits, allowing stack collision with another memory region. CVSS 3.0 is 7.4 with local attack vector and high complexity.
Likely exposure
Exposure is most likely on unpatched Linux distributions or appliances shipping systemd through v240. The attacker needs local execution capability, so shared servers, developer systems, jump hosts, and platforms running untrusted local workloads deserve priority review.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Public research and multiple vendor advisories confirm the vulnerability class and impact, but exploitation requires local conditions and is rated high complexity.
Researcher notes
Evidence supports local denial of service and possible privilege escalation in systemd-journald through v240. The provided data does not justify claims of remote exploitation, active exploitation, or product impact beyond listed vendor/distribution advisories.
Mitigation direction
- Inventory systems running systemd versions through v240.
- Apply security updates from the relevant OS or appliance vendor.
- Prioritize shared hosts and systems running untrusted local code.
- Check Red Hat, Debian, Ubuntu, Gentoo, NetApp, and Oracle guidance where applicable.
- Use vendor-supported packages rather than manual systemd replacement.
Validation and detection
- Confirm installed systemd package version and vendor patch level.
- Map affected assets to distribution advisories in the source list.
- Verify systemd-journald is present and in use on each host.
- Check change records for January 2019 or later systemd security updates.
- Review vendor appliance advisories for bundled systemd exposure.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-770: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-16864 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H1.45.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.4HighVector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2019:0342CVE reference · vendor-advisory, x_refsource_REDHAT
- [debian-lts-announce] 20190123 [SECURITY] [DLA 1639-1] systemd security updateCVE reference · mailing-list, x_refsource_MLIST
- DSA-4367CVE reference · vendor-advisory, x_refsource_DEBIAN
- RHSA-2019:0204CVE reference · vendor-advisory, x_refsource_REDHAT
- https://security.netapp.com/advisory/ntap-20190117-0001/CVE reference · x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16864CVE reference · x_refsource_CONFIRM
- https://www.qualys.com/2019/01/09/system-down/system-down.txtCVE reference · x_refsource_MISC
- USN-3855-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- RHSA-2019:0049CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2019:0271CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2019:0361CVE reference · vendor-advisory, x_refsource_REDHAT
- GLSA-201903-07CVE reference · vendor-advisory, x_refsource_GENTOO
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlCVE reference · x_refsource_MISC
- RHBA-2019:0327CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2019:2402CVE reference · vendor-advisory, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.