ubuntu-cve-2026-29111
Vulnerability from osv_ubuntu
Published
2026-03-23 20:00
Modified
2026-04-22 07:58
Summary
Details

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.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "systemd-timesyncd",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          },
          {
            "binary_name": "udev",
            "binary_version": "245.4-4ubuntu3.24+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@245.4-4ubuntu3.24+esm3?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "245.4-4ubuntu3.24+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "242-7ubuntu3",
        "243-2ubuntu1",
        "243-3ubuntu1",
        "244-3ubuntu1",
        "244.1-0ubuntu2",
        "244.1-0ubuntu3",
        "244.2-1ubuntu1",
        "244.3-1ubuntu1",
        "245.2-1ubuntu1",
        "245.2-1ubuntu2",
        "245.4-2ubuntu1",
        "245.4-4ubuntu1",
        "245.4-4ubuntu3",
        "245.4-4ubuntu3.1",
        "245.4-4ubuntu3.2",
        "245.4-4ubuntu3.3",
        "245.4-4ubuntu3.4",
        "245.4-4ubuntu3.5",
        "245.4-4ubuntu3.6",
        "245.4-4ubuntu3.7",
        "245.4-4ubuntu3.10",
        "245.4-4ubuntu3.11",
        "245.4-4ubuntu3.13",
        "245.4-4ubuntu3.14",
        "245.4-4ubuntu3.15",
        "245.4-4ubuntu3.16",
        "245.4-4ubuntu3.17",
        "245.4-4ubuntu3.18",
        "245.4-4ubuntu3.19",
        "245.4-4ubuntu3.20",
        "245.4-4ubuntu3.21",
        "245.4-4ubuntu3.22",
        "245.4-4ubuntu3.23",
        "245.4-4ubuntu3.24",
        "245.4-4ubuntu3.24+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-oomd",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-repart",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-standalone-sysusers",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-standalone-tmpfiles",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "systemd-timesyncd",
            "binary_version": "249.11-0ubuntu3.19"
          },
          {
            "binary_name": "udev",
            "binary_version": "249.11-0ubuntu3.19"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@249.11-0ubuntu3.19?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "249.11-0ubuntu3.19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "248.3-1ubuntu8",
        "249.5-2ubuntu1",
        "249.5-2ubuntu2",
        "249.5-2ubuntu3",
        "249.5-2ubuntu4",
        "249.9-0ubuntu2",
        "249.10-0ubuntu1",
        "249.10-0ubuntu2",
        "249.11-0ubuntu1",
        "249.11-0ubuntu2",
        "249.11-0ubuntu3",
        "249.11-0ubuntu3.1",
        "249.11-0ubuntu3.3",
        "249.11-0ubuntu3.4",
        "249.11-0ubuntu3.6",
        "249.11-0ubuntu3.7",
        "249.11-0ubuntu3.9",
        "249.11-0ubuntu3.10",
        "249.11-0ubuntu3.11",
        "249.11-0ubuntu3.12",
        "249.11-0ubuntu3.15",
        "249.11-0ubuntu3.16",
        "249.11-0ubuntu3.17"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libsystemd-shared",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-boot",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-boot-efi",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-homed",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-oomd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-resolved",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-standalone-sysusers",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-standalone-tmpfiles",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-timesyncd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-ukify",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "systemd-userdbd",
            "binary_version": "255.4-1ubuntu8.14"
          },
          {
            "binary_name": "udev",
            "binary_version": "255.4-1ubuntu8.14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@255.4-1ubuntu8.14?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "255.4-1ubuntu8.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "253.5-1ubuntu6",
        "253.5-1ubuntu7",
        "255.2-3ubuntu2",
        "255.4-1ubuntu5",
        "255.4-1ubuntu6",
        "255.4-1ubuntu7",
        "255.4-1ubuntu8",
        "255.4-1ubuntu8.1",
        "255.4-1ubuntu8.2",
        "255.4-1ubuntu8.4",
        "255.4-1ubuntu8.5",
        "255.4-1ubuntu8.6",
        "255.4-1ubuntu8.8",
        "255.4-1ubuntu8.10",
        "255.4-1ubuntu8.11",
        "255.4-1ubuntu8.12"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnss-myhostname",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libnss-mymachines",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libnss-resolve",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libnss-systemd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libpam-systemd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libsystemd-shared",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libsystemd0",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "libudev1",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-boot",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-boot-efi",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-boot-tools",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-container",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-coredump",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-cryptsetup",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-homed",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-journal-remote",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-oomd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-repart",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-resolved",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-standalone-shutdown",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-standalone-sysusers",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-standalone-tmpfiles",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-sysv",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-tests",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-timesyncd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-ukify",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "systemd-userdbd",
            "binary_version": "257.9-0ubuntu2.3"
          },
          {
            "binary_name": "udev",
            "binary_version": "257.9-0ubuntu2.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "systemd",
        "purl": "pkg:deb/ubuntu/systemd@257.9-0ubuntu2.3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "257.9-0ubuntu2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "257.4-1ubuntu3",
        "257.6-1ubuntu1",
        "257.7-1ubuntu1",
        "257.7-1ubuntu3",
        "257.8-0ubuntu2",
        "257.9-0ubuntu1",
        "257.9-0ubuntu2",
        "257.9-0ubuntu2.1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-29111",
  "modified": "2026-04-22T07:58:33Z",
  "published": "2026-03-23T20:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-29111"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-29111"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8119-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8119-2"
    }
  ],
  "related": [
    "USN-8119-1",
    "USN-8119-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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-2026-29111"
  ]
}



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