CVE-2021-3655

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Summary

CVECVE-2021-3655
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-08-05 21:15:13 UTC
Updated2026-10-08 21:17:40 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 3.3 LOW from [email protected]

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

EPSS: 0.003080000 probability, percentile 0.217320000 (date 2026-10-10)

Problem Types: CWE-909 | CWE-20 | CWE-909 CWE-909

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary3.3LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.0[email protected]Primary2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:L/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 9.0 All All All
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 5.14 - All All
Operating System Redhat Enterprise Linux 8.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel affected kernel v5.14-rc1 Not specified

References

ReferenceSourceLinkTags
[SECURITY] [DLA 2785-1] linux-4.19 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
1984024 – (CVE-2021-3655) CVE-2021-3655 kernel: missing size validations on inbound SCTP packets af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch, Third Party Advisory
[SECURITY] [DLA 2843-1] linux security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159402 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel-container (ELSA-2021-9458)
  • 159403 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9459)
  • 159404 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9460)
  • 159424 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9485)
  • 159427 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel-container (ELSA-2021-9488)
  • 178844 Debian Security Update for linux-4.19 (DLA 2785-1)
  • 178943 Debian Security Update for linux (DLA 2843-1)
  • 179705 Debian Security Update for linux (CVE-2021-3655)
  • 198562 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5136-1)
  • 198569 Ubuntu Security Notification for Linux kernel (OEM 5.10) Vulnerabilities (USN-5139-1)
  • 198586 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5162-1)
  • 198587 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5163-1)
  • 198588 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5161-1)
  • 352503 Amazon Linux Security Advisory for kernel: ALAS2-2021-1696
  • 352871 Amazon Linux Security Advisory for kernel : ALAS-2021-1539
  • 353143 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-008
  • 353145 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-006
  • 353156 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-004
  • 353242 Amazon Linux Security Advisory for kernel : ALAC2012-2022-036
  • 353243 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2022-037
  • 353244 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2022-038
  • 390248 Oracle Managed Virtualization (VM) Server for x86 Security Update for kernel (OVMSA-2021-0035)
  • 610401 Google Android Devices March 2022 Security Patch Missing
  • 610408 Google Android April 2022 Security Patch Missing for Huawei EMUI
  • 610409 Google Android April 2022 Security Patch Missing for Samsung
  • 6140304 AWS Bottlerocket Security Update for kernel (GHSA-p42f-xmmp-85vh)
  • 671134 EulerOS Security Update for kernel (EulerOS-SA-2021-2688)
  • 671137 EulerOS Security Update for kernel (EulerOS-SA-2021-2713)
  • 671268 EulerOS Security Update for kernel (EulerOS-SA-2022-1196)
  • 671344 EulerOS Security Update for kernel (EulerOS-SA-2022-1271)
  • 671703 EulerOS Security Update for kernel (EulerOS-SA-2022-1735)
  • 751336 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1460-1)
  • 751342 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3641-1)
  • 751346 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3655-1)
  • 751349 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1477-1)
  • 751353 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3675-1)
  • 751381 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:3748-1)
  • 751437 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:3876-1)
  • 751441 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3876-1)
  • 751451 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:3935-1)
  • 751473 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:3969-1)
  • 751476 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:3972-1)
  • 900294 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901115 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6576-1)
  • 903126 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5154)
  • 905803 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (5154-1)

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