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Vulnerability record · CVE-2019-6454 · published 21 March 2019

CVE-2019-6454: Systemd project systemd out-of-bounds write vulnerability

Systemd Project · Systemd

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).

5.5 CVSS 3.1 Medium EPSS 2.0% · top 19.7% CWE-787 · Out-of-bounds write
5.5CVSS 3.1 base score, v2 4.9
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
22Affected product versions listed by NVD
36References, 2 tagged exploit
17 Jun 2026Last modified by 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).

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

Affected products

22 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/18/3 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/19/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/2 ExploitMailing ListThird Party Advisory
http://www.securityfocus.com/bid/107081 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:0368 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0990 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1322 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1502 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2805 Third Party Advisory
https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c PatchThird Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10278 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXL
https://security.netapp.com/advisory/ntap-20190327-0004/ Third Party Advisory
https://usn.ubuntu.com/3891-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4393 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/18/3 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/02/19/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/20/2 ExploitMailing ListThird Party Advisory
http://www.securityfocus.com/bid/107081 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:0368 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0990 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1322 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1502 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2805 Third Party Advisory
https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c PatchThird Party Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10278 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXL
https://security.netapp.com/advisory/ntap-20190327-0004/ Third Party Advisory
https://usn.ubuntu.com/3891-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4393 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-6454), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.