{"uuid": "576f2de9-0f36-4247-b1dd-51b66a575fa5", "vulnerability": {"vulnId": "CVE-2021-3493", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "576f2de9-0f36-4247-b1dd-51b66a575fa5"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2022-10-20T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2022-10-20T00:00:00Z", "recorded_at": "2026-02-02T13:24:01Z", "first_seen_at": "2022-10-20T00:00:00Z"}, "scope": {"notes": "KEV entry: Linux Kernel Privilege Escalation Vulnerability | Affected: Linux / Kernel | Description: The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation. | Required action: Apply updates per vendor instructions. | Due date: 2022-11-10 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52; https://nvd.nist.gov/vuln/detail/CVE-2021-3493"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-862"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "Kernel", "due_date": "2022-11-10", "date_added": "2022-10-20", "vendorProject": "Linux", "vulnerabilityName": "Linux Kernel Privilege Escalation Vulnerability", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2021-3493", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-3493"}]}