UnratedFix available

libvirt vulnerabilities

Type: advisorySource: OSV1 source record

It was discovered that libvirt had an integer overflow vulnerability in the NodeGetFreePages RPC handler. A local attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-18917) It was discovered that libvirt did not correctly handle symbolic links when changing ownership of the TPM emulator log file. A local attacker with access to the swtpm account could possibly use this issue to cause libvirt to change the ownership of an arbitrary file. (CVE-2026-77159)

Announced 28 Sept 2026Group revision 1

Original source ↗

USN-8831-1

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:USN-8831-1

libvirt

Source reference: /affected/0/package/name

Affected versions: 7.6.0-0ubuntu1
Source reference: /affected/0/versions
7.6.0-0ubuntu3
Source reference: /affected/0/versions
8.0.0-1ubuntu3
Source reference: /affected/0/versions
8.0.0-1ubuntu4
Source reference: /affected/0/versions
8.0.0-1ubuntu5
Source reference: /affected/0/versions
8.0.0-1ubuntu6
Source reference: /affected/0/versions
8.0.0-1ubuntu7
Source reference: /affected/0/versions
8.0.0-1ubuntu7.1
Source reference: /affected/0/versions
8.0.0-1ubuntu7.2
Source reference: /affected/0/versions
8.0.0-1ubuntu7.3
Source reference: /affected/0/versions
8.0.0-1ubuntu7.4
Source reference: /affected/0/versions
8.0.0-1ubuntu7.5
Source reference: /affected/0/versions
8.0.0-1ubuntu7.6
Source reference: /affected/0/versions
8.0.0-1ubuntu7.7
Source reference: /affected/0/versions
8.0.0-1ubuntu7.8
Source reference: /affected/0/versions
8.0.0-1ubuntu7.9
Source reference: /affected/0/versions
8.0.0-1ubuntu7.10
Source reference: /affected/0/versions
8.0.0-1ubuntu7.11
Source reference: /affected/0/versions
8.0.0-1ubuntu7.12
Source reference: /affected/0/versions
8.0.0-1ubuntu7.13
Source reference: /affected/0/versions
8.0.0-1ubuntu7.14
Source reference: /affected/0/versions
8.0.0-1ubuntu7.15
Source reference: /affected/0/versions
8.0.0-1ubuntu7.16
Source reference: /affected/0/versions
8.0.0-1ubuntu7.17
Source reference: /affected/0/versions
8.0.0-1ubuntu7.18
Source reference: /affected/0/versions
8.0.0-1ubuntu7.19
Source reference: /affected/0/versions
8.0.0-1ubuntu7.20
Source reference: /affected/0/versions
Fixed versions: 8.0.0-1ubuntu7.21
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

libvirt

Source reference: /affected/1/package/name

Affected versions: 9.6.0-1ubuntu1
Source reference: /affected/1/versions
9.6.0-1ubuntu2
Source reference: /affected/1/versions
10.0.0-1ubuntu1
Source reference: /affected/1/versions
10.0.0-2ubuntu1
Source reference: /affected/1/versions
10.0.0-2ubuntu5
Source reference: /affected/1/versions
10.0.0-2ubuntu7
Source reference: /affected/1/versions
10.0.0-2ubuntu8
Source reference: /affected/1/versions
10.0.0-2ubuntu8.1
Source reference: /affected/1/versions
10.0.0-2ubuntu8.2
Source reference: /affected/1/versions
10.0.0-2ubuntu8.3
Source reference: /affected/1/versions
10.0.0-2ubuntu8.4
Source reference: /affected/1/versions
10.0.0-2ubuntu8.5
Source reference: /affected/1/versions
10.0.0-2ubuntu8.6
Source reference: /affected/1/versions
10.0.0-2ubuntu8.7
Source reference: /affected/1/versions
10.0.0-2ubuntu8.8
Source reference: /affected/1/versions
10.0.0-2ubuntu8.9
Source reference: /affected/1/versions
10.0.0-2ubuntu8.10
Source reference: /affected/1/versions
10.0.0-2ubuntu8.11
Source reference: /affected/1/versions
10.0.0-2ubuntu8.12
Source reference: /affected/1/versions
10.0.0-2ubuntu8.13
Source reference: /affected/1/versions
10.0.0-2ubuntu8.14
Source reference: /affected/1/versions
10.0.0-2ubuntu8.15
Source reference: /affected/1/versions
10.0.0-2ubuntu8.16
Source reference: /affected/1/versions
10.0.0-2ubuntu8.17
Source reference: /affected/1/versions
Fixed versions: 10.0.0-2ubuntu8.19
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

libvirt

Source reference: /affected/2/package/name

Affected versions: 11.6.0-1ubuntu3
Source reference: /affected/2/versions
11.6.0-1ubuntu5
Source reference: /affected/2/versions
11.6.0-1ubuntu6
Source reference: /affected/2/versions
11.6.0-1ubuntu7
Source reference: /affected/2/versions
11.6.0-1ubuntu8
Source reference: /affected/2/versions
12.0.0-1ubuntu3
Source reference: /affected/2/versions
12.0.0-1ubuntu5
Source reference: /affected/2/versions
12.0.0-1ubuntu5.1
Source reference: /affected/2/versions
12.0.0-1ubuntu5.2
Source reference: /affected/2/versions
12.0.0-1ubuntu5.3
Source reference: /affected/2/versions
12.0.0-1ubuntu5.4
Source reference: /affected/2/versions
Fixed versions: 12.0.0-1ubuntu5.5
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "8.0.0-1ubuntu7.21"
          }
        ]
      }
    ],
    "package": {
      "name": "libvirt",
      "purl": "pkg:deb/ubuntu/libvirt?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "7.6.0-0ubuntu1",
      "7.6.0-0ubuntu3",
      "8.0.0-1ubuntu3",
      "8.0.0-1ubuntu4",
      "8.0.0-1ubuntu5",
      "8.0.0-1ubuntu6",
      "8.0.0-1ubuntu7",
      "8.0.0-1ubuntu7.1",
      "8.0.0-1ubuntu7.2",
      "8.0.0-1ubuntu7.3",
      "8.0.0-1ubuntu7.4",
      "8.0.0-1ubuntu7.5",
      "8.0.0-1ubuntu7.6",
      "8.0.0-1ubuntu7.7",
      "8.0.0-1ubuntu7.8",
      "8.0.0-1ubuntu7.9",
      "8.0.0-1ubuntu7.10",
      "8.0.0-1ubuntu7.11",
      "8.0.0-1ubuntu7.12",
      "8.0.0-1ubuntu7.13",
      "8.0.0-1ubuntu7.14",
      "8.0.0-1ubuntu7.15",
      "8.0.0-1ubuntu7.16",
      "8.0.0-1ubuntu7.17",
      "8.0.0-1ubuntu7.18",
      "8.0.0-1ubuntu7.19",
      "8.0.0-1ubuntu7.20"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8831-1.json",
      "cves_map": {
        "cves": [
          {
            "id": "CVE-2026-18917",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          },
          {
            "id": "CVE-2026-77159",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          }
        ],
        "ecosystem": "Ubuntu:22.04:LTS"
      }
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libnss-libvirt",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-clients",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-config-network",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-config-nwfilter",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-lxc",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-qemu",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-gluster",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-iscsi-direct",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-rbd",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-zfs",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-vbox",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-driver-xen",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-system",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-system-systemd",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-daemon-system-sysv",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-login-shell",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-sanlock",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt-wireshark",
          "binary_version": "8.0.0-1ubuntu7.21"
        },
        {
          "binary_name": "libvirt0",
          "binary_version": "8.0.0-1ubuntu7.21"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "10.0.0-2ubuntu8.19"
          }
        ]
      }
    ],
    "package": {
      "name": "libvirt",
      "purl": "pkg:deb/ubuntu/libvirt?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "9.6.0-1ubuntu1",
      "9.6.0-1ubuntu2",
      "10.0.0-1ubuntu1",
      "10.0.0-2ubuntu1",
      "10.0.0-2ubuntu5",
      "10.0.0-2ubuntu7",
      "10.0.0-2ubuntu8",
      "10.0.0-2ubuntu8.1",
      "10.0.0-2ubuntu8.2",
      "10.0.0-2ubuntu8.3",
      "10.0.0-2ubuntu8.4",
      "10.0.0-2ubuntu8.5",
      "10.0.0-2ubuntu8.6",
      "10.0.0-2ubuntu8.7",
      "10.0.0-2ubuntu8.8",
      "10.0.0-2ubuntu8.9",
      "10.0.0-2ubuntu8.10",
      "10.0.0-2ubuntu8.11",
      "10.0.0-2ubuntu8.12",
      "10.0.0-2ubuntu8.13",
      "10.0.0-2ubuntu8.14",
      "10.0.0-2ubuntu8.15",
      "10.0.0-2ubuntu8.16",
      "10.0.0-2ubuntu8.17"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8831-1.json",
      "cves_map": {
        "cves": [
          {
            "id": "CVE-2026-18917",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          },
          {
            "id": "CVE-2026-77159",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          }
        ],
        "ecosystem": "Ubuntu:24.04:LTS"
      }
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libnss-libvirt",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-clients",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-clients-qemu",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-config-network",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-config-nwfilter",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-lxc",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-qemu",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-gluster",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-iscsi-direct",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-rbd",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-zfs",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-vbox",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-driver-xen",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-system",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-system-systemd",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-daemon-system-sysv",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-l10n",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-login-shell",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-sanlock",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt-wireshark",
          "binary_version": "10.0.0-2ubuntu8.19"
        },
        {
          "binary_name": "libvirt0",
          "binary_version": "10.0.0-2ubuntu8.19"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "12.0.0-1ubuntu5.5"
          }
        ]
      }
    ],
    "package": {
      "name": "libvirt",
      "purl": "pkg:deb/ubuntu/libvirt?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "11.6.0-1ubuntu3",
      "11.6.0-1ubuntu5",
      "11.6.0-1ubuntu6",
      "11.6.0-1ubuntu7",
      "11.6.0-1ubuntu8",
      "12.0.0-1ubuntu3",
      "12.0.0-1ubuntu5",
      "12.0.0-1ubuntu5.1",
      "12.0.0-1ubuntu5.2",
      "12.0.0-1ubuntu5.3",
      "12.0.0-1ubuntu5.4"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8831-1.json",
      "cves_map": {
        "cves": [
          {
            "id": "CVE-2026-18917",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          },
          {
            "id": "CVE-2026-77159",
            "severity": [
              {
                "type": "CVSS_V3",
                "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
              },
              {
                "type": "Ubuntu",
                "score": "medium"
              }
            ]
          }
        ],
        "ecosystem": "Ubuntu:26.04:LTS"
      }
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "libnss-libvirt",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-clients",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-clients-qemu",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-common",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-common",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-config-network",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-config-nwfilter",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-interface",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-lxc",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-network",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-nodedev",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-nwfilter",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-qemu",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-secret",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-disk",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-gluster",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-iscsi",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-iscsi-direct",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-logical",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-mpath",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-rbd",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-scsi",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-storage-zfs",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-vbox",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-driver-xen",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-lock",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-log",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-plugin-lockd",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-plugin-sanlock",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-system",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-system-systemd",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-daemon-system-sysv",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-l10n",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-login-shell",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-sanlock",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-ssh-proxy",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt-wireshark",
          "binary_version": "12.0.0-1ubuntu5.5"
        },
        {
          "binary_name": "libvirt0",
          "binary_version": "12.0.0-1ubuntu5.5"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #23448 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 06:19:24 GMT
Publisher date: Mon, 28 Sep 2026 11:48:10 GMT

Read the original announcement

Revision history

25 Oct 2026USN-8831-1 · Revision 1Source updated