UBUNTU-CVE-2026-29111

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Source
https://ubuntu.com/security/CVE-2026-29111
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29111.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-29111
Upstream
Downstream
Related
Published
2026-03-23T20:00:00Z
Modified
2026-04-22T16:28:39.004822Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:20.04:LTS / systemd

Package

Name
systemd
Purl
pkg:deb/ubuntu/systemd@245.4-4ubuntu3.24+esm3?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
245.4-4ubuntu3.24+esm3

Affected versions

Other
242-7ubuntu3
243-2ubuntu1
243-3ubuntu1
244-3ubuntu1
244.*
244.1-0ubuntu2
244.1-0ubuntu3
244.2-1ubuntu1
244.3-1ubuntu1
245.*
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 

{
    "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"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29111.json"

Ubuntu:22.04:LTS / systemd

Package

Name
systemd
Purl
pkg:deb/ubuntu/systemd@249.11-0ubuntu3.19?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
249.11-0ubuntu3.19

Affected versions

248.*
248.3-1ubuntu8
249.*
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 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29111.json"

Ubuntu:24.04:LTS / systemd

Package

Name
systemd
Purl
pkg:deb/ubuntu/systemd@255.4-1ubuntu8.14?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
255.4-1ubuntu8.14

Affected versions

253.*
253.5-1ubuntu6
253.5-1ubuntu7
255.*
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 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29111.json"

Ubuntu:25.10 / systemd

Package

Name
systemd
Purl
pkg:deb/ubuntu/systemd@257.9-0ubuntu2.3?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
257.9-0ubuntu2.3

Affected versions

257.*
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

Ecosystem specific 

{
    "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"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29111.json"