ubuntu-cve-2026-40227
Vulnerability from osv_ubuntu
Published
2026-04-10 16:16
Modified
2026-05-20 15:27
Summary
Details

In systemd 260 before 261, a local unprivileged user can trigger an assert via an IPC API call with an array or map that has a null element.


{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gir1.2-gudev-1.0",
            "binary_version": "1:204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libgudev-1.0-0",
            "binary_version": "1:204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libsystemd-daemon0",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libsystemd-id128-0",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libsystemd-journal0",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libsystemd-login0",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "python-systemd",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "systemd",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "systemd-services",
            "binary_version": "204-5ubuntu20.31+esm3"
          },
          {
            "binary_name": "udev",
            "binary_version": "204-5ubuntu20.31+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@204-5ubuntu20.31+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "204-5ubuntu6",
        "204-5ubuntu7",
        "204-5ubuntu8",
        "204-5ubuntu9",
        "204-5ubuntu10",
        "204-5ubuntu11",
        "204-5ubuntu13",
        "204-5ubuntu14",
        "204-5ubuntu15",
        "204-5ubuntu16",
        "204-5ubuntu17",
        "204-5ubuntu18",
        "204-5ubuntu19",
        "204-5ubuntu20",
        "204-5ubuntu20.2",
        "204-5ubuntu20.3",
        "204-5ubuntu20.4",
        "204-5ubuntu20.5",
        "204-5ubuntu20.6",
        "204-5ubuntu20.7",
        "204-5ubuntu20.8",
        "204-5ubuntu20.9",
        "204-5ubuntu20.10",
        "204-5ubuntu20.11",
        "204-5ubuntu20.12",
        "204-5ubuntu20.13",
        "204-5ubuntu20.14",
        "204-5ubuntu20.15",
        "204-5ubuntu20.18",
        "204-5ubuntu20.19",
        "204-5ubuntu20.20",
        "204-5ubuntu20.21",
        "204-5ubuntu20.22",
        "204-5ubuntu20.24",
        "204-5ubuntu20.25",
        "204-5ubuntu20.26",
        "204-5ubuntu20.28",
        "204-5ubuntu20.29",
        "204-5ubuntu20.31",
        "204-5ubuntu20.31+esm2",
        "204-5ubuntu20.31+esm3"
      ]
    },
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          },
          {
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          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "229-4ubuntu21.31+esm4"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "229-4ubuntu21.31+esm4"
          },
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          },
          {
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          },
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          },
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          {
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          {
            "binary_name": "systemd-sysv",
            "binary_version": "229-4ubuntu21.31+esm4"
          },
          {
            "binary_name": "udev",
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          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
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      },
      "ranges": [
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        "229-4ubuntu21.28",
        "229-4ubuntu21.29",
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        "229-4ubuntu21.31+esm1",
        "229-4ubuntu21.31+esm3",
        "229-4ubuntu21.31+esm4"
      ]
    },
    {
      "ecosystem_specific": {
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          {
            "binary_name": "libnss-myhostname",
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          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "237-3ubuntu10.57+esm3"
          },
          {
            "binary_name": "libnss-resolve",
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          },
          {
            "binary_name": "libnss-systemd",
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          },
          {
            "binary_name": "libpam-systemd",
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          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "237-3ubuntu10.57+esm3"
          },
          {
            "binary_name": "libudev1",
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          },
          {
            "binary_name": "systemd",
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          },
          {
            "binary_name": "systemd-container",
            "binary_version": "237-3ubuntu10.57+esm3"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "237-3ubuntu10.57+esm3"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "237-3ubuntu10.57+esm3"
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          },
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            "binary_name": "systemd-boot-tools",
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          },
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            "binary_name": "systemd-container",
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            "binary_name": "systemd-coredump",
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            "binary_name": "systemd-cryptsetup",
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            "binary_name": "systemd-homed",
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            "binary_name": "systemd-journal-remote",
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          },
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            "binary_name": "systemd-oomd",
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            "binary_name": "systemd-resolved",
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            "binary_name": "systemd-standalone-sysusers",
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            "binary_name": "systemd-standalone-tmpfiles",
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            "binary_name": "systemd-userdbd",
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            "binary_name": "udev",
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      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@257.9-0ubuntu2.4?arch=source\u0026distro=questing"
      },
      "ranges": [
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          "events": [
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              "introduced": "0"
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          ],
          "type": "ECOSYSTEM"
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      "versions": [
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        "257.7-1ubuntu1",
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    },
    {
      "ecosystem_specific": {
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            "binary_name": "libnss-myhostname",
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          {
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          {
            "binary_name": "libnss-systemd",
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            "binary_name": "systemd-boot-efi",
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          },
          {
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          },
          {
            "binary_name": "systemd-coredump",
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          },
          {
            "binary_name": "systemd-cryptsetup",
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          },
          {
            "binary_name": "systemd-homed",
            "binary_version": "259.5-0ubuntu3"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "259.5-0ubuntu3"
          },
          {
            "binary_name": "systemd-oomd",
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          },
          {
            "binary_name": "systemd-repart",
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          },
          {
            "binary_name": "systemd-resolved",
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          },
          {
            "binary_name": "systemd-standalone-shutdown",
            "binary_version": "259.5-0ubuntu3"
          },
          {
            "binary_name": "systemd-standalone-sysusers",
            "binary_version": "259.5-0ubuntu3"
          },
          {
            "binary_name": "systemd-standalone-tmpfiles",
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          },
          {
            "binary_name": "systemd-sysv",
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          },
          {
            "binary_name": "systemd-tests",
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          },
          {
            "binary_name": "systemd-timesyncd",
            "binary_version": "259.5-0ubuntu3"
          },
          {
            "binary_name": "systemd-ukify",
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          },
          {
            "binary_name": "systemd-userdbd",
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          },
          {
            "binary_name": "udev",
            "binary_version": "259.5-0ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@259.5-0ubuntu3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "259-1ubuntu2",
        "259-1ubuntu3",
        "259.3-0ubuntu1",
        "259.5-0ubuntu1",
        "259.5-0ubuntu2",
        "259.5-0ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "In systemd 260 before 261, a local unprivileged user can trigger an assert via an IPC API call with an array or map that has a null element.",
  "id": "UBUNTU-CVE-2026-40227",
  "modified": "2026-05-20T15:27:26Z",
  "published": "2026-04-10T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-40227"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40227"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/systemd/systemd/security/advisories/GHSA-848h-497j-8vjq"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-40227"
  ],
  "withdrawn": "2026-06-05T17:45:53Z"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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