Is CVE-2019-6454 in the CISA KEV catalog?

No. CVE-2019-6454 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-6454?

CVE-2019-6454 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2019-6454?

CVE-2019-6454 has an EPSS score of 2.04% (79th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-6454?

Upgrade systemd on debian 11 to 240-6 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2019-6454

MEDIUMEPSS 79th pctl

5.5

CVSS v3

NVD

Description

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).

CWE-787Out-of-bounds Write

How to fix

Remediation Available

systemdDebian

Fixed in:240-6CVE-2019-6454

libsystemd0Ubuntu

Fixed in:229-4ubuntu21.16USN-3891-1

Fixed in:237-3ubuntu10.13USN-3891-1

systemdUbuntu

Fixed in:229-4ubuntu21.16USN-3891-1

Fixed in:237-3ubuntu10.13USN-3891-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.04%probability of exploitation in 30 days

79thpercentile

Elevated risk: more likely to be exploited than 79% of all known CVEs.

References

Patch3

Exploit1

openwall.com

Third-Party Advisory13

Other references1

lists.fedoraproject.org

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.