Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-3655

CVE-2021-3655LOW

n/a kernel — A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  L  N  N    3.3   .0031   22.1     —

AFFECTED
  Product  Versions            Fixed
  kernel   kernel v5.14-rc1 –  —

TIMELINE
  Jul 20  Reserved by redhat
  Aug 5   Published (CNA: redhat)
  Oct 8   ENRICHED — CVE-2021-3655 (kernel). Received CVSS 3.3 and CPE data from NVD.

CWE-20, CWE-909 · CNA: redhat · CVSS v3.1 · 3 references · NVD status: Modified

Description

A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 20, 2021	Reserved	Reserved by redhat
August 5, 2021	Published	Published (CNA: redhat)
October 8, 2026	ENRICHED	ENRICHED — CVE-2021-3655 (kernel). Received CVSS 3.3 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	kernel	—	kernel v5.14-rc1	—

Weaknesses

CWE-20 · CWE-909

References (3)

https://bugzilla.redhat.com/show_bug.cgi?id=1984024 [Issue Tracking, Patch, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html [Mailing List, Third Party Advisory]

Authoritative record: CVE-2021-3655 at cve.org

Weaknesses: CWE-20 · CWE-909

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-3655 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 Monday, October 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.