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Vulnerability record · CVE-2021-3655 · published 5 August 2021

CVE-2021-3655: Linux kernel improper input validation vulnerability

Linux · Linux Kernel

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.

3.3 CVSS 3.1 Low EPSS 0.31% · top 78.8% CWE-909 · CWE-909CWE-20 · Improper input validation
3.3CVSS 3.1 base score, v2 2.1
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1984024 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1984024 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-3655), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.