CVE-2026-9639

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9639", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-05-26T18:31:05.985Z", "datePublished": "2026-06-26T15:39:04.696Z", "dateUpdated": "2026-06-26T16:02:11.520Z"}, "containers": {"cna": {"title": "Authenticated Denial of Service via Malicious Backup Tarball in LXD", "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."}], "affected": [{"vendor": "Canonical", "product": "LXD", "packageName": "LXD", "platforms": ["Linux"], "repo": "https://github.com/canonical/lxd", "defaultStatus": "unaffected", "versions": [{"version": "5.21.0", "status": "affected", "versionType": "semver", "lessThan": "5.21.5"}, {"version": "6.0", "status": "affected", "versionType": "semver", "lessThan": "6.9"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-476 NULL pointer dereference", "cweId": "CWE-476", "type": "CWE"}]}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8", "tags": ["vdb-entry", "vendor-advisory"]}, {"url": "https://github.com/canonical/lxd/pull/18320", "tags": ["patch"]}, {"url": "https://github.com/canonical/lxd/pull/18390", "tags": ["patch"]}], "impacts": [{"capecId": "CAPEC-153", "descriptions": [{"lang": "en", "value": "Input Data Manipulation"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "source": {"discovery": "EXTERNAL"}, "solutions": [{"lang": "en", "value": "Upgrade to LXD version 5.21.5 or later, or 6.9 or later."}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-06-26T15:39:04.696Z"}}, "adp": [{"references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-26T16:01:50.334142Z", "id": "CVE-2026-9639", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-26T16:02:11.520Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-9639", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-26T16:01:50.334142Z"}}}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-26T16:02:07.362Z"}}], "cna": {"title": "Authenticated Denial of Service via Malicious Backup Tarball in LXD", "source": {"discovery": "EXTERNAL"}, "impacts": [{"capecId": "CAPEC-153", "descriptions": [{"lang": "en", "value": "Input Data Manipulation"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "product": "LXD", "versions": [{"status": "affected", "version": "5.21.0", "lessThan": "5.21.5", "versionType": "semver"}, {"status": "affected", "version": "6.0", "lessThan": "6.9", "versionType": "semver"}], "platforms": ["Linux"], "packageName": "LXD", "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Upgrade to LXD version 5.21.5 or later, or 6.9 or later."}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8", "tags": ["vdb-entry", "vendor-advisory"]}, {"url": "https://github.com/canonical/lxd/pull/18320", "tags": ["patch"]}, {"url": "https://github.com/canonical/lxd/pull/18390", "tags": ["patch"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL pointer dereference"}]}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-06-26T15:39:04.696Z"}}}, "cveMetadata": {"cveId": "CVE-2026-9639", "state": "PUBLISHED", "dateUpdated": "2026-06-26T16:02:11.520Z", "dateReserved": "2026-05-26T18:31:05.985Z", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "datePublished": "2026-06-26T15:39:04.696Z", "assignerShortName": "canonical"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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"}]}], "source": "security@ubuntu.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "matchCriteriaId": "39995265-6759-42FE-BBAD-9062C9928A9B", "versionEndExcluding": "5.21.5", "versionStartIncluding": "5.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "matchCriteriaId": "C25E18E8-CDDF-4F3A-A80E-F27456981A4B", "versionEndExcluding": "6.9", "versionStartIncluding": "6.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "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."}, {"lang": "es", "value": "Desreferencia de puntero nulo en CreateCustomVolumeFromBackup en LXD hasta la versi\u00f3n 6.8 y 5.21 en Linux permite a un usuario autenticado con permisos can_create_storage_volumes causar una denegaci\u00f3n de servicio mediante un tarball de respaldo de volumen personalizado especialmente dise\u00f1ado que omite el campo de instant\u00e1nea expires_at."}], "id": "CVE-2026-9639", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security@ubuntu.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9639", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-26T16:01:50.334142Z", "version": "2.0.3"}}]}, "published": "2026-06-26T16:16:37.143", "references": [{"source": "security@ubuntu.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/canonical/lxd/pull/18320"}, {"source": "security@ubuntu.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/canonical/lxd/pull/18390"}, {"source": "security@ubuntu.com", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[5.21.0,5.21.5)"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "generic", "value": "[6.0,6.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "LXD", "source": "cna", "vendor": "Canonical"}, "product": "lxd", "vendor": "canonical"}], "created": "2026-06-26T17:45:03.936259+00:00", "updated": "2026-06-26T23:00:08.481681+00:00", "vendors": ["canonical", "canonical$PRODUCT$lxd"]}