CVE-2019-6454

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
80%
KEV
Not listed

Published

March 21, 2019

Last Modified

November 21, 2024

References (36)

Vendor Advisories for CVE-2019-6454(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuudev-udeb (237-3ubuntu10.13) @ bionic2026-05-27ubuntu
redhatsystemd-0:219-30.el7_3.142019-09-19redhat
redhatsystemd-0:219-42.el7_4.162019-06-18redhat
redhatsystemd-0:219-57.el7_5.62019-06-04redhat
redhatsystemd-0:239-13.el8_0.32019-05-07redhat
redhatrhvm-appliance-0:4.2-20190224.0.el72019-03-05redhat
redhatredhat-virtualization-host-0:4.2-20190219.0.el7_62019-03-05redhat
redhatsystemd-0:219-62.el7_6.52019-02-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
systemd—240-6—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
systemd—240-6—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
systemd—240-6—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
systemd—240-6—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
systemd215-17 ... 215-17+deb8u9 (10 versions)215-17+deb8u10—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
systemd232-25 ... 232-25+deb9u8 (9 versions)232-25+deb9u9—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 147 total refreshes for this CVE.

  1. 2026-09-19 15:37 UTCEPSS rescore
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  21. 2026-07-23 01:46 UTCEG score recompute
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Frequently asked(5)

What is CVE-2019-6454?
CVE-2019-6454 is a medium vulnerability published on March 21, 2019. An issue was discovered in sd-bus in systemd 239. busprocessobject() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to…
When was CVE-2019-6454 disclosed?
CVE-2019-6454 was first published in the National Vulnerability Database on March 21, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-6454 actively exploited?
CVE-2019-6454 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 19.8% of all scored CVEs.
What is the CVSS score of CVE-2019-6454?
CVE-2019-6454 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2019-6454?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-6454, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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