libvirt-hwe vulnerabilities
It was discovered that libvirt did not properly validate newline characters in DNS TXT record values and SRV record attributes in its virtual network driver. A local attacker with permission to define virtual networks could possibly use this issue to inject arbitrary dnsmasq configuration directives, leading to arbitrary command execution as root. (CVE-2026-61477) It was discovered that libvirt did not properly handle errors during XML context parsing. An attacker could possibly use this issue to cause libvirt to crash, resulting in a denial of service. (CVE-2026-61478) He Wei discovered that libvirt had a symlink-following vulnerability in the file ownership change function used for virtual TPM state directories. A local attacker running as the swtpm user could possibly use this issue to cause libvirt to change the ownership of an arbitrary file, leading to privilege escalation. (CVE-2026-63622) It was discovered that libvirt created storage volume images with overly permissive permissions during clone or convert operations. A local attacker could possibly use this issue to read guest disk contents, resulting in information disclosure. (CVE-2026-63623) It was discovered that libvirt had an integer overflow in the NodeGetFreePages RPC handler. A local attacker could possibly use this issue to cause libvirt to crash or execute arbitrary code. (CVE-2026-18917) It was discovered that libvirt had a symlink-following flaw in the virtual TPM emulator setup function. A local attacke
USN-8833-1
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-8833-1
libvirt-hwe
Source reference: /affected/0/package/name
- Affected versions
- 12.0.0-1ubuntu5
Source reference:
/affected/0/versions12.0.0-1ubuntu5.1Source reference:
/affected/0/versions12.0.0-1ubuntu5.2Source reference:
/affected/0/versions12.0.0-1ubuntu5.3Source reference:
/affected/0/versions - Fixed versions
- 12.0.0-1ubuntu5.5
Source reference:
/affected/0/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": "12.0.0-1ubuntu5.5"
}
]
}
],
"package": {
"name": "libvirt-hwe",
"purl": "pkg:deb/ubuntu/libvirt-hwe?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"12.0.0-1ubuntu5",
"12.0.0-1ubuntu5.1",
"12.0.0-1ubuntu5.2",
"12.0.0-1ubuntu5.3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8833-1.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-2026-61477",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-61478",
"severity": [
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-63622",
"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-2026-63623",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
},
{
"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-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-clients-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-clients-qemu-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-common-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-common-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-config-network-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-config-nwfilter-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-interface-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-lxc-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-network-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-nodedev-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-nwfilter-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-qemu-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-secret-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-disk-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-gluster-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-iscsi-direct-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-iscsi-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-logical-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-mpath-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-rbd-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-scsi-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-storage-zfs-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-vbox-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-driver-xen-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-lock-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-log-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-plugin-lockd-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-plugin-sanlock-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-system-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-system-systemd-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-daemon-system-sysv-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-dev-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-doc-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-l10n-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-login-shell-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-sanlock-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-ssh-proxy-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt-wireshark-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
},
{
"binary_name": "libvirt0-hwe",
"binary_version": "12.0.0-1ubuntu5.5"
}
],
"availability": "No subscription required"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #23450 · Revision 1
- Added to Heist Feed
- Publisher date