Lennart Poettering

7 exploits Active since Jan 2017
CVE-2016-10156 WRITEUP HIGH WRITEUP
systemd <v229 - Privilege Escalation
A flaw in systemd v228 in /src/basic/fs-util.c caused world writable suid files to be created when using the systemd timers features, allowing local attackers to escalate their privileges to root. This is fixed in v229.
CVSS 7.8
CVE-2020-1712 WRITEUP HIGH WRITEUP
systemd < 245-rc1 - Use-After-Free via Asynchronous Polkit Queries
A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.
CVSS 7.8
CVE-2020-1712 WRITEUP HIGH WRITEUP
systemd < 245-rc1 - Use-After-Free via Asynchronous Polkit Queries
A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.
CVSS 7.8
CVE-2026-29111 WRITEUP MEDIUM WRITEUP
systemd v239-v249 - Memory Corruption
systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.
CVSS 5.5
CVE-2026-29111 WRITEUP MEDIUM WRITEUP
systemd v239-v249 - Memory Corruption
systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.
CVSS 5.5
CVE-2020-1712 WRITEUP HIGH WRITEUP
systemd < 245-rc1 - Use-After-Free via Asynchronous Polkit Queries
A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.
CVSS 7.8
CVE-2022-2526 WRITEUP CRITICAL WRITEUP
systemd - Use-After-Free in DNS Stream Reference Counting
A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.
CVSS 9.8