CVE-2019-6454
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).
Does this matter?
Lower severity and a low EPSS score (2.04%). Track it; it rarely justifies an emergency change on its own.
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
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.04% probability · 81th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- systemd project/systemd · opensuse/leap · netapp/active iq performance analytics services · debian/debian linux · fedoraproject/fedora · canonical/ubuntu linux · redhat/enterprise linux · redhat/enterprise linux compute node eus · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux for ibm z systems eus · redhat/enterprise linux for power big endian eus · redhat/enterprise linux for power little endian · redhat/enterprise linux for power little endian eus · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server for power little endian update services for sap solutions · redhat/enterprise linux server tus · redhat/enterprise linux server update services for sap solutions · +2 more
- Source
- cve@mitre.org
EPSS 2.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107081Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0368Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0990Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1322Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1502Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2805Third Party Advisory
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.cPatch, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00031.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
- 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-4393Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/20/2Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107081Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0368Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0990Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1322Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1502Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2805Third Party Advisory
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.cPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.