{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63298", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-07-16T09:49:29.911Z", "datePublished": "2026-08-12T19:22:07.286Z", "dateUpdated": "2026-08-12T19:22:07.286Z"}, "containers": {"cna": {"title": "LXD arbitrary lxc.conf directive injection via NVIDIA instance configuration", "descriptions": [{"lang": "en", "value": "An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon."}], "affected": [{"vendor": "Canonical", "product": "LXD", "packageName": "LXD", "platforms": ["Linux"], "repo": "https://github.com/canonical/lxd", "defaultStatus": "unaffected", "versions": [{"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": "4.0.0", "status": "affected", "versionType": "semver", "lessThan": "4.0.12"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "cweId": "CWE-78", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-81", "descriptions": [{"lang": "en", "value": "Input Data Manipulation"}]}, {"capecId": "CAPEC-233", "descriptions": [{"lang": "en", "value": "Privilege Escalation"}]}], "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2", "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": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH"}}], "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."}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-08-12T19:22:07.286Z"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "LXD", "platforms": ["Linux"], "product": "LXD", "repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "versions": [{"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": "4.0.12", "status": "affected", "version": "4.0.0", "versionType": "semver"}]}], "source": "security@ubuntu.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon."}], "id": "CVE-2026-63298", "lastModified": "2026-08-12T20:17:47.713", "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": "2026-08-12T20:17:47.713", "references": [{"source": "security@ubuntu.com", "url": "https://github.com/canonical/lxd/security/advisories/GHSA-vfh7-q59q-54v2"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

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