CVE•Published 2021-08-05•Modified 2026-10-08•0 articles on news•6 live references•NVD data

CVE-2021-3655Linux · Linux_kernel

Vulnerability data via NVD (ingested)

CVSS v3.1

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

Exploit Prediction Scoring System · top 78% of all CVEs

Weaknesses (CWE)

CWE-909Missing Initialization of Resource CWE-20Improper Input Validation

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.

Timeline

Published 2021-08-05

Modified 2026-10-08

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag3 hosts

vuln:CVE-2021-3655

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · OS

os:"Linux Kernel"

Hosts Shodan identified as running Linux Kernel.

More intel sources (5)

Shodan report

vuln:CVE-2021-3655

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2021-3655