{
  "cveId": "CVE-2021-33910",
  "url": "https://patchblox.com/security/cve/CVE-2021-33910",
  "summary": "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.",
  "title": "systemd: The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init s...",
  "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.\n\nSecurity Fix(es):\n\n* systemd: uncontrolled allocation on the stack in function unit_name_path_escape leads to crash (CVE-2021-33910)\n\nFor 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.",
  "published": "2021-07-20T05:00:00Z",
  "severity": "Important",
  "cvss": 5.5,
  "epss": 0.08792,
  "epssPercentile": 0.95211,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libnss-myhostname",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libnss-myhostname 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss-myhostname-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-myhostname",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libnss-myhostname 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss-myhostname-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-mymachines",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libnss-mymachines 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss-mymachines-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-mymachines",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libnss-mymachines 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss-mymachines-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-resolve",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libnss-resolve 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss-resolve-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-resolve",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libnss-resolve 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss-resolve-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-systemd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libnss-systemd 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss-systemd-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-systemd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libnss-systemd 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss-systemd-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libpam-systemd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libpam-systemd 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libpam-systemd-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libpam-systemd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libpam-systemd 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libpam-systemd-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libsystemd0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libsystemd0 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libsystemd0-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libsystemd0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libsystemd0 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libsystemd0-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libudev1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "libudev1 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libudev1-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libudev1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "libudev1 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libudev1-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-container",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-container",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd-container 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-container-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-container",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-container 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-container-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-container",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-coredump",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd-coredump 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-coredump-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-coredump",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-coredump 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-coredump-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-devel",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-journal-remote",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-journal-remote",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd-journal-remote 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-journal-remote-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-journal-remote",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-journal-remote 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-journal-remote-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-journal-remote",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-libs",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-libs",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-pam",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-pam",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-sysv",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd-sysv 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-sysv-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-sysv",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-sysv 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-sysv-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-tests",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-tests",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "systemd-tests 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-systemd-tests-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-tests",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-tests 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-tests-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-tests",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-timesyncd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "systemd-timesyncd 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-systemd-timesyncd-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-udev",
      "release": "RHEL 8",
      "fixedVersion": "0:239-45.el8_4.2",
      "fix": "RHSA-2021:2717",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "systemd-udev",
      "release": "ol 8",
      "fixedVersion": "0:239-45.0.2.el8_4.2",
      "fix": "ELSA-2021-2717",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2717",
      "released": "2021-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "udev",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "237-3ubuntu10.49",
      "fix": "udev 237-3ubuntu10.49",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-udev-237-3ubuntu10.49",
      "released": "2021-07-20T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "udev",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "245.4-4ubuntu3.10",
      "fix": "udev 245.4-4ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-udev-245.4-4ubuntu3.10",
      "released": "2021-07-20T05:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}