{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63294", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-07-16T09:49:29.911Z", "datePublished": "2026-08-12T19:57:07.898Z", "dateUpdated": "2026-08-12T19:57:07.898Z"}, "containers": {"cna": {"title": "Root RCE via image backup.yaml symlink", "descriptions": [{"lang": "en", "value": "A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges."}], "affected": [{"vendor": "Canonical", "product": "LXD", "packageName": "LXD", "platforms": ["Linux"], "repo": "https://github.com/canonical/lxd", "defaultStatus": "unaffected", "versions": [{"version": "4.0.0", "status": "affected", "versionType": "semver", "lessThan": "4.0.12"}, {"version": "5.0.0", "status": "affected", "versionType": "semver", "lessThan": "5.0.8"}, {"version": "5.21.0", "status": "affected", "versionType": "semver", "lessThan": "5.21.6"}, {"version": "6.0", "status": "affected", "versionType": "semver", "lessThan": "6.10"}]}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-59 Improper Link Resolution Before File Access ('Link Following')", "cweId": "CWE-59"}]}], "impacts": [{"capecId": "CAPEC-132", "descriptions": [{"lang": "en", "value": "Symlink Symbolic Link Execution"}]}, {"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "Privilege Escalation"}]}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4m", "tags": ["vdb-entry", "vendor-advisory"]}], "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:C/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL"}}], "source": {"discovery": "EXTERNAL"}, "solutions": [{"lang": "en", "value": "Upgrade to LXD version 4.0.12 or later, 5.0.8 or later, or 5.12.6 or later, or 6.10 or later."}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-08-12T19:57:07.898Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "LXD", "platforms": ["Linux"], "product": "LXD", "repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "versions": [{"lessThan": "4.0.12", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "5.0.8", "status": "affected", "version": "5.0.0", "versionType": "semver"}, {"lessThan": "5.21.6", "status": "affected", "version": "5.21.0", "versionType": "semver"}, {"lessThan": "6.10", "status": "affected", "version": "6.0", "versionType": "semver"}]}], "source": "security@ubuntu.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges."}], "id": "CVE-2026-63294", "lastModified": "2026-08-12T20:17:47.187", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "security@ubuntu.com", "type": "Secondary"}]}, "published": "2026-08-12T20:17:47.187", "references": [{"source": "security@ubuntu.com", "url": "https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4m"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.12)"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[5.0.0,5.0.8)"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[5.21.0,5.21.6)"}}, {"platform": ["linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[6.0,6.10)"}}], "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": "2026-08-12T21:45:10.181952+00:00", "updated": "2026-08-12T21:45:10.181974+00:00", "vendors": ["canonical", "canonical$PRODUCT$lxd"]}