# CVE-2021-33910: systemd: The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init s... CVE-2021-33910 is fixed in 19 products on 1 platform, first by libnss-myhostname 237-3ubuntu10.49, released July 20, 2021. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2021-33910 - Priority: Routine - CVSS: 5.5 (Important) - EPSS: 0.0879 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 20, 2021 ## Description The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit. Security Fix(es): * systemd: uncontrolled allocation on the stack in function unit_name_path_escape leads to crash (CVE-2021-33910) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libnss-myhostname Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libnss-myhostname 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-myhostname-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libnss-myhostname Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libnss-myhostname 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnss-myhostname-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libnss-mymachines Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libnss-mymachines 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-mymachines-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libnss-mymachines Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libnss-mymachines 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnss-mymachines-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libnss-resolve Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libnss-resolve 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-resolve-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libnss-resolve Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libnss-resolve 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnss-resolve-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libnss-systemd Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libnss-systemd 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnss-systemd-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libnss-systemd Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libnss-systemd 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnss-systemd-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libpam-systemd Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libpam-systemd 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpam-systemd-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libpam-systemd Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libpam-systemd 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpam-systemd-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libsystemd0 Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libsystemd0 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsystemd0-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libsystemd0 Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libsystemd0 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsystemd0-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | libudev1 Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [libudev1 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libudev1-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | libudev1 Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [libudev1 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libudev1-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-container RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-container Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd-container 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-container-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd-container Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-container 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-container-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-container ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-coredump Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd-coredump 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-coredump-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd-coredump Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-coredump 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-coredump-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-devel RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-devel ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-journal-remote RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-journal-remote Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd-journal-remote 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-journal-remote-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd-journal-remote Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-journal-remote 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-journal-remote-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-journal-remote ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-libs RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-libs ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-pam RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-pam ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-sysv Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd-sysv 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-sysv-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd-sysv Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-sysv 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-sysv-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-tests RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-tests Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [systemd-tests 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-systemd-tests-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | systemd-tests Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-tests 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-tests-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-tests ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-timesyncd Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [systemd-timesyncd 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-systemd-timesyncd-245.4-4ubuntu3.10.md) | Jul 20, 2021 | | Linux | systemd-udev RHEL 8 | 0:239-45.el8_4.2 | [RHSA-2021:2717](https://patchblox.com/security/data/fix/linux/rhsa-2021-2717.md) | Jul 21, 2021 | | Linux | systemd-udev ol 8 | 0:239-45.0.2.el8_4.2 | [ELSA-2021-2717](https://patchblox.com/security/data/fix/linux/elsa-2021-2717.md) | Jul 21, 2021 | | Linux | udev Ubuntu 18.04.6 LTS (bionic) | 237-3ubuntu10.49 | [udev 237-3ubuntu10.49](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-udev-237-3ubuntu10.49.md) | Jul 20, 2021 | | Linux | udev Ubuntu 20.04 LTS (focal) | 245.4-4ubuntu3.10 | [udev 245.4-4ubuntu3.10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-udev-245.4-4ubuntu3.10.md) | Jul 20, 2021 | --- Data as of 2026-11-08T19:12:23Z UTC. 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