{"uuid": "658c453d-e96d-40c3-978e-571aae7c2c0c", "vulnerability": {"vulnId": "CVE-2021-22555", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "658c453d-e96d-40c3-978e-571aae7c2c0c"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2025-10-06T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2025-10-06T00:00:00Z", "recorded_at": "2026-02-02T13:24:01Z", "first_seen_at": "2025-10-06T00:00:00Z"}, "scope": {"notes": "KEV entry: Linux Kernel Heap Out-of-Bounds Write Vulnerability | Affected: Linux / Kernel | Description: Linux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-10-27 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21 ; https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d ; https://security.netapp.com/advisory/ntap-20210805-0010/ ; https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528 ; https://nvd.nist.gov/vuln/detail/CVE-2021-22555"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-787"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "Kernel", "due_date": "2025-10-27", "date_added": "2025-10-06", "vendorProject": "Linux", "vulnerabilityName": "Linux Kernel Heap Out-of-Bounds Write Vulnerability", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2021-22555", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-22555"}]}