Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U N H H 7.1 .0037 30.7 —
AFFECTED Product Versions Fixed kernel 5.9 – —
TIMELINE Apr 15 Reserved by redhat May 5 Published (CNA: redhat) Aug 5 ENRICHED — CVE-2021-3501 (Linux kernel). Received CVSS 7.1 and CPE data from NVD.
A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.
| Date | Event | Detail |
|---|---|---|
| April 15, 2021 | Reserved | Reserved by redhat |
| May 5, 2021 | Published | Published (CNA: redhat) |
| August 5, 2026 | ENRICHED | ENRICHED — CVE-2021-3501 (Linux kernel). Received CVSS 7.1 and CPE data from NVD. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Linux | kernel | — | 5.9 | — |
Authoritative record: CVE-2021-3501 at cve.org
Vendors: linux
Weaknesses: CWE-787
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-3501 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.