{"api_version":"1","generated_at":"2026-06-26T18:57:52+00:00","cve":"CVE-2026-9639","urls":{"html":"https://cve.report/CVE-2026-9639","api":"https://cve.report/api/cve/CVE-2026-9639.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-9639","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-9639"},"summary":{"title":"Authenticated Denial of Service via Malicious Backup Tarball in LXD","description":"Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.","state":"PUBLISHED","assigner":"canonical","published_at":"2026-06-26 16:16:37","updated_at":"2026-06-26 17:16:35"},"problem_types":["CWE-476","CWE-476 CWE-476 NULL pointer dereference"],"metrics":[{"version":"3.1","source":"security@ubuntu.com","type":"Secondary","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/canonical/lxd/pull/18390","name":"https://github.com/canonical/lxd/pull/18390","refsource":"security@ubuntu.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/canonical/lxd/pull/18320","name":"https://github.com/canonical/lxd/pull/18320","refsource":"security@ubuntu.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8","name":"https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8","refsource":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-9639","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9639","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Canonical","product":"LXD","version":"affected 5.21.0 5.21.5 semver","platforms":["Linux"]},{"source":"CNA","vendor":"Canonical","product":"LXD","version":"affected 6.0 6.9 semver","platforms":["Linux"]}],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"Upgrade to LXD version 5.21.5 or later, or 6.9 or later.","time":"","lang":"en"}],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-9639","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-06-26T16:01:50.334142Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-06-26T16:02:11.520Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["exploit"],"url":"https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","packageName":"LXD","platforms":["Linux"],"product":"LXD","repo":"https://github.com/canonical/lxd","vendor":"Canonical","versions":[{"lessThan":"5.21.5","status":"affected","version":"5.21.0","versionType":"semver"},{"lessThan":"6.9","status":"affected","version":"6.0","versionType":"semver"}]}],"descriptions":[{"lang":"en","value":"Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field."}],"impacts":[{"capecId":"CAPEC-153","descriptions":[{"lang":"en","value":"Input Data Manipulation"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","description":"CWE-476 NULL pointer dereference","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-26T15:39:04.696Z","orgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","shortName":"canonical"},"references":[{"tags":["vdb-entry","vendor-advisory"],"url":"https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8"},{"tags":["patch"],"url":"https://github.com/canonical/lxd/pull/18320"},{"tags":["patch"],"url":"https://github.com/canonical/lxd/pull/18390"}],"solutions":[{"lang":"en","value":"Upgrade to LXD version 5.21.5 or later, or 6.9 or later."}],"source":{"discovery":"EXTERNAL"},"title":"Authenticated Denial of Service via Malicious Backup Tarball in LXD"}},"cveMetadata":{"assignerOrgId":"cc1ad9ee-3454-478d-9317-d3e869d708bc","assignerShortName":"canonical","cveId":"CVE-2026-9639","datePublished":"2026-06-26T15:39:04.696Z","dateReserved":"2026-05-26T18:31:05.985Z","dateUpdated":"2026-06-26T16:02:11.520Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-26 16:16:37","lastModifiedDate":"2026-06-26 17:16:35","problem_types":["CWE-476","CWE-476 CWE-476 NULL pointer dereference"],"metrics":{"cvssMetricV31":[{"source":"security@ubuntu.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-26T16:01:50.334142Z","id":"CVE-2026-9639","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"9639","Ordinal":"1","Title":"Authenticated Denial of Service via Malicious Backup Tarball in ","CVE":"CVE-2026-9639","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"9639","Ordinal":"1","NoteData":"Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.","Type":"Description","Title":"Authenticated Denial of Service via Malicious Backup Tarball in "}]}}}