{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-95838", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-22T16:39:45.793Z", "datePublished": "2026-10-12T19:53:24.599Z", "dateUpdated": "2026-10-13T20:24:33.956Z"}, "containers": {"cna": {"title": "containerd: Unpack DoS via repeated opaque whiteouts", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-407", "lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 4.6, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4"}, {"name": "https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0", "tags": ["x_refsource_MISC"], "url": "https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0"}], "affected": [{"vendor": "containerd", "product": "containerd", "versions": [{"version": "< 1.7.35", "status": "affected"}, {"version": ">= 2.0.0-beta.0, < 2.0.12", "status": "affected"}, {"version": ">= 2.2.0, < 2.2.8", "status": "affected"}, {"version": ">= 2.3.0, < 2.3.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-12T19:53:24.599Z"}, "descriptions": [{"lang": "en", "value": "containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger repeated directory traversals while opaque whiteouts are processed. Pulling or importing the image can consume CPU, delay container startup, and reduce image-pull concurrency for unrelated deployments. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5."}], "source": {"advisory": "GHSA-rp3h-jf77-q9p4", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-13T20:13:22.924285Z", "id": "CVE-2026-95838", "options": [{"Exploitation": "none"}, {"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": "2026-10-13T20:24:33.956Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "containerd", "vendor": "containerd", "versions": [{"status": "affected", "version": "< 1.7.35"}, {"status": "affected", "version": ">= 2.0.0-beta.0, < 2.0.12"}, {"status": "affected", "version": ">= 2.2.0, < 2.2.8"}, {"status": "affected", "version": ">= 2.3.0, < 2.3.5"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger repeated directory traversals while opaque whiteouts are processed. Pulling or importing the image can consume CPU, delay container startup, and reduce image-pull concurrency for unrelated deployments. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5."}], "id": "CVE-2026-95838", "lastModified": "2026-10-16T16:00:33.533", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-95838", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-13T20:13:22.924285Z", "version": "2.0.3"}}]}, "published": "2026-10-12T20:17:10.577", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0"}, {"source": "security-advisories@github.com", "url": "https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-407"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "github.com/containerd/containerd: containerd: Denial of Service via repeated directory traversals during layer unpacking", "id": "2549893", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2549893"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-606", "details": ["containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger repeated directory traversals while opaque whiteouts are processed. Pulling or importing the image can consume CPU, delay container startup, and reduce image-pull concurrency for unrelated deployments. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5.", "A flaw was found in containerd. When unpacking image layers with specific file configurations such as opaque whiteout markers, the unpack handler performs repeated directory traversals. An attacker can exploit this by providing a maliciously crafted container image, leading to a Denial of Service (DoS) through excessive CPU consumption, prolonged image extraction times, and delays to unrelated container deployments."], "name": "CVE-2026-95838", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "git-sync", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-12T19:53:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-95838\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-95838\nhttps://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0\nhttps://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.7.35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0-beta.0,2.0.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.2.0,2.2.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.3.0,2.3.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "containerd", "source": "cna", "vendor": "containerd"}, "product": "containerd", "vendor": "containerd"}], "created": "2026-10-12T21:45:17.228218+00:00", "updated": "2026-10-20T13:15:14.192434+00:00", "vendors": ["containerd", "containerd$PRODUCT$containerd"]}