BlackTreeCVE Intelligence
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Full vulnerability report · 2022
CVE-2021-4197High confidence

n/a kernel — Improper Authentication

Unknown · kernel

7.8HighCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Medium, lowered one band.downgradedsince 3 Aug 2024

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.54% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Unknown kernel and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 1 affected package state shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.15.15-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.15.15-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.15.15-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.15.15-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2021-4197 · CSAF 2.0 · revision 43 · interimSUSE Product Security TeamCVE-2021-4197
15 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SLES 15 SP1 CHOST Images for Amazon EC2
  • SLES 15 SP2 CHOST Images for Amazon EC2
  • SLES 15 SP3 CHOST Images for Amazon EC2
  • SLES 15 SP4 CHOST Images for Amazon EC2
  • SLES 15 SP5 CHOST Images for Amazon EC2
  • SLES 15 SP1 CHOST Images for Google
  • SLES 15 SP2 CHOST Images for Google
  • SLES 15 SP3 CHOST Images for Google
  • SLES 15 SP4 CHOST Images for Google
  • SLES 15 SP5 CHOST Images for Google
  • SLES 15 SP1 CHOST Images for Microsoft Azure
  • SLES 15 SP2 CHOST Images for Microsoft Azure
Summary
An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-34056

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

What

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Improper Authentication → disrupt the affected service
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-287 ↗

CWE-287: Improper Authentication. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Denial of serviceCWE-287
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2022-0515IBM Spectrum Protect: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in IBM Spectrum Protect ausnutzen, um einen Denial-of-Service-Zustand herbeizuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, beliebigen Code auszuführen, seine Rechte zu erweitern oder beliebigen Code mit Root-Rechten auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20220330Security Bulletin 30 Mar 2022

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 30 Mar 2022, published on 30 March 2022. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-689Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service à distance et une atteinte à l'intégrité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-669Multiples vulnérabilités dans le noyau Linux de Red Hat

De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-645Multiples vulnérabilités dans le noyau Linux d'Ubuntu

https://ubuntu.com/security/notices/USN-5515-1 Bulletin de sécurité Ubuntu USN-5517-1 du 13 juillet 2022 https://ubuntu.com/security/notices/USN-5517-1 Bulletin de sécurité Ubuntu USN-5518-1 du 14 juillet 2022 https://ubuntu.com/security/notices/USN-5518-1 Référence CVE CVE-2021-3609 https://www.cve.org/CVERecord?id=CVE-2021-3609 Référence CVE CVE-2021-3752 https://www.cve.org/CVERecord?id=CVE-2021-3752 Référence CVE CVE-2021-3760 https://www.cve.org/CVERecord?id=CVE-2021-3760 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-39714 https://www.cve.org/CVERecord?id=CVE-2021-39714 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4202 https://www.cve.org/CVERecord?id=CVE-2021-4202 Référence CVE CVE-2022-0330 https://www.cve.org/CVERecord?id=CVE-2022-0330 Référence CVE CVE-2022-0500 https://www.cve.org/CVERecord?id=CVE-2022-0500 Référence CVE CVE-2022-1011 https://www.cve.org/CVERecord?id=CVE-2022-1011 Référence CVE CVE-2022-1195 https://www.cve.org/CVERecord?id=CVE-2022-1195 Référence CVE CVE-2022-1198 https://www.cve.org/CVERecord?id=CVE-2022-1198 Référence CVE CVE-2022-1199 https://www.cve.org/CVERecord?id=CVE-2022-1199 Référence CVE CVE-2022-1204 https://www.cve.org/CVERecord?id=CVE-2022-1204 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-621Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-606Multiples vulnérabilités dans le noyau Linux de Debian

ni de service Non spécifié par l'éditeur Élévation de privilèges Systèmes affectés Debian "Buster" versions antérieures à 4.19.249-2 Résumé De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et un contournement de la politique de sécurité. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Debian dsa-5173 du 03 juillet 2022 https://www.debian.org/security/2022/dsa-5173 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2022-0494 https://www.cve.org/CVERecord?id=CVE-2022-0494 Référence CVE CVE-2022-0812 https://www.cve.org/CVERecord?id=CVE-2022-0812 Référence CVE CVE-2022-0854 https://www.cve.org/CVERecord?id=CVE-2022-0854 Référence CVE CVE-2022-1011 https://www.cve.org/CVERecord?id=CVE-2022-1011 Référence CVE CVE-2022-1012 https://www.cve.org/CVERecord?id=CVE-2022-1012 Référence CVE CVE-2022-1016 https://www.cve.org/CVERecord?id=CVE-2022-1016 Référence CVE CVE-2022-1048 https://www.cve.org/CVERecord?id=CVE-2022-1048 Référence CVE CVE-2022-1184 https://www.cve.org/CVERecord?id=CVE-2022-1184 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-604Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, une exécution de code arbitraire et un déni de service.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-591Multiples vulnérabilités dans les produits IBM

org/CVERecord?id=CVE-2021-38201 Référence CVE CVE-2021-4002 https://www.cve.org/CVERecord?id=CVE-2021-4002 Référence CVE CVE-2021-4028 https://www.cve.org/CVERecord?id=CVE-2021-4028 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-41190 https://www.cve.org/CVERecord?id=CVE-2021-41190 Référence CVE CVE-2021-4154 https://www.cve.org/CVERecord?id=CVE-2021-4154 Référence CVE CVE-2021-4155 https://www.cve.org/CVERecord?id=CVE-2021-4155 Référence CVE CVE-2021-4157 https://www.cve.org/CVERecord?id=CVE-2021-4157 Référence CVE CVE-2021-41864 https://www.cve.org/CVERecord?id=CVE-2021-41864 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4203 https://www.cve.org/CVERecord?id=CVE-2021-4203 Référence CVE CVE-2021-42248 https://www.cve.org/CVERecord?id=CVE-2021-42248 Référence CVE CVE-2021-42836 https://www.cve.org/CVERecord?id=CVE-2021-42836 Référence CVE CVE-2021-43565 https://www.cve.org/CVERecord?id=CVE-2021-43565 Référence CVE CVE-2021-43784 https://www.cve.org/CVERecord?id=CVE-2021-43784 Référence CVE CVE-2021-44716 https://www.cve.org/CVERecord?id=CVE-2021-44716 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-44907 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-527Multiples vulnérabilités dans le noyau Linux d'Ubuntu

ntu USN-5467-1 du 08 juin 2022 https://ubuntu.com/security/notices/USN-5467-1 Bulletin de sécurité Ubuntu USN-5468-1 du 08 juin 2022 https://ubuntu.com/security/notices/USN-5468-1 Bulletin de sécurité Ubuntu USN-5469-1 du 08 juin 2022 https://ubuntu.com/security/notices/USN-5469-1 Bulletin de sécurité Ubuntu USN-5470-1 du 08 juin 2022 https://ubuntu.com/security/notices/USN-5470-1 Bulletin de sécurité Ubuntu USN-5471-1 du 08 juin 2022 https://ubuntu.com/security/notices/USN-5471-1 Référence CVE CVE-2021-3772 https://www.cve.org/CVERecord?id=CVE-2021-3772 Référence CVE CVE-2021-4149 https://www.cve.org/CVERecord?id=CVE-2021-4149 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-46790 https://www.cve.org/CVERecord?id=CVE-2021-46790 Référence CVE CVE-2022-0168 https://www.cve.org/CVERecord?id=CVE-2022-0168 Référence CVE CVE-2022-1011 https://www.cve.org/CVERecord?id=CVE-2022-1011 Référence CVE CVE-2022-1012 https://www.cve.org/CVERecord?id=CVE-2022-1012 Référence CVE CVE-2022-1016 https://www.cve.org/CVERecord?id=CVE-2022-1016 Référence CVE CVE-2022-1048 https://www.cve.org/CVERecord?id=CVE-2022-1048 Référence CVE CVE-2022-1158 https://www.cve.org/CVERecord?id=CVE-2022-1158 Référence CVE CVE-2022-1195 https://www.cve.org/CVERecord?id=CVE-2022-1195

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-415Multiples vulnérabilités dans le noyau Linux de Debian

De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Elles permettent à un attaquant de provoquer un déni de service, une atteinte à la confidentialité des données et une élévation de privilèges.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-323Multiples vulnérabilités dans le noyau Linux d'Ubuntu

ty/notices/USN-5368-1 Référence CVE CVE-2021-28711 https://www.cve.org/CVERecord?id=CVE-2021-28711 Référence CVE CVE-2021-28712 https://www.cve.org/CVERecord?id=CVE-2021-28712 Référence CVE CVE-2021-28713 https://www.cve.org/CVERecord?id=CVE-2021-28713 Référence CVE CVE-2021-28714 https://www.cve.org/CVERecord?id=CVE-2021-28714 Référence CVE CVE-2021-28715 https://www.cve.org/CVERecord?id=CVE-2021-28715 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-39698 https://www.cve.org/CVERecord?id=CVE-2021-39698 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-43975 https://www.cve.org/CVERecord?id=CVE-2021-43975 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45402 https://www.cve.org/CVERecord?id=CVE-2021-45402 Référence CVE CVE-2021-45480 https://www.cve.org/CVERecord?id=CVE-2021-45480 Référence CVE CVE-2022-0264 https://www.cve.org/CVERecord?id=CVE-2022-0264 Référence CVE CVE-2022-0382 https://www.cve.org/CVERecord?id=CVE-2022-0382 Référence CVE CVE-2022-0435 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-265Multiples vulnérabilités dans le noyau Linux de Ubuntu

ord?id=CVE-2021-38160 Référence CVE CVE-2021-38198 https://www.cve.org/CVERecord?id=CVE-2021-38198 Référence CVE CVE-2021-38204 https://www.cve.org/CVERecord?id=CVE-2021-38204 Référence CVE CVE-2021-38208 https://www.cve.org/CVERecord?id=CVE-2021-38208 Référence CVE CVE-2021-39648 https://www.cve.org/CVERecord?id=CVE-2021-39648 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-39698 https://www.cve.org/CVERecord?id=CVE-2021-39698 Référence CVE CVE-2021-40490 https://www.cve.org/CVERecord?id=CVE-2021-40490 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-42008 https://www.cve.org/CVERecord?id=CVE-2021-42008 Référence CVE CVE-2021-43389 https://www.cve.org/CVERecord?id=CVE-2021-43389 Référence CVE CVE-2021-43975 https://www.cve.org/CVERecord?id=CVE-2021-43975 Référence CVE CVE-2021-43976 https://www.cve.org/CVERecord?id=CVE-2021-43976 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45402 https://www.cve.org/CVERecord?id=CVE-2021-45402 Référence CVE CVE-2021-45469 https://www.cve.org/CVERecord?id=C

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-178Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-162Multiples vulnérabilités dans le noyau Linux de SUSE

g/CVERecord?id=CVE-2021-28715 Référence CVE CVE-2021-33098 https://www.cve.org/CVERecord?id=CVE-2021-33098 Référence CVE CVE-2021-3564 https://www.cve.org/CVERecord?id=CVE-2021-3564 Référence CVE CVE-2021-39648 https://www.cve.org/CVERecord?id=CVE-2021-39648 Référence CVE CVE-2021-39657 https://www.cve.org/CVERecord?id=CVE-2021-39657 Référence CVE CVE-2021-4002 https://www.cve.org/CVERecord?id=CVE-2021-4002 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-4149 https://www.cve.org/CVERecord?id=CVE-2021-4149 Référence CVE CVE-2021-4155 https://www.cve.org/CVERecord?id=CVE-2021-4155 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4202 https://www.cve.org/CVERecord?id=CVE-2021-4202 Référence CVE CVE-2021-43976 https://www.cve.org/CVERecord?id=CVE-2021-43976 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45485 https://www.cve.org/CVERecord?id=CVE-2021-45485 Référence CVE CVE-2021-45486 https://www.cve.org/CVERecord?id=CVE-2021-45486 Référence CVE CVE-2022-0330 https://www.cve.org/CVERecord?id=CVE-2022-0330 Gestion détaillée du document le 18 février 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À pr

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-144Multiples vulnérabilités dans le noyau Linux de SUSE

rg/CVERecord?id=CVE-2021-3564 Référence CVE CVE-2021-39648 https://www.cve.org/CVERecord?id=CVE-2021-39648 Référence CVE CVE-2021-39657 https://www.cve.org/CVERecord?id=CVE-2021-39657 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-4002 https://www.cve.org/CVERecord?id=CVE-2021-4002 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4149 https://www.cve.org/CVERecord?id=CVE-2021-4149 Référence CVE CVE-2021-4159 https://www.cve.org/CVERecord?id=CVE-2021-4159 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4202 https://www.cve.org/CVERecord?id=CVE-2021-4202 Référence CVE CVE-2021-43975 https://www.cve.org/CVERecord?id=CVE-2021-43975 Référence CVE CVE-2021-43976 https://www.cve.org/CVERecord?id=CVE-2021-43976 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45486 https://www.cve.org/CVERecord?id=CVE-2021-45486 Référence CVE CVE-2022-0286 https://www.cve.org/CVERecord?id=CVE-2022-0286 Référence CVE CVE-2022-0322 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-141Multiples vulnérabilités dans le noyau Linux de SUSE

org/CVERecord?id=CVE-2021-39648 Référence CVE CVE-2021-39657 https://www.cve.org/CVERecord?id=CVE-2021-39657 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-4002 https://www.cve.org/CVERecord?id=CVE-2021-4002 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4149 https://www.cve.org/CVERecord?id=CVE-2021-4149 Référence CVE CVE-2021-4155 https://www.cve.org/CVERecord?id=CVE-2021-4155 Référence CVE CVE-2021-4159 https://www.cve.org/CVERecord?id=CVE-2021-4159 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4202 https://www.cve.org/CVERecord?id=CVE-2021-4202 Référence CVE CVE-2021-43975 https://www.cve.org/CVERecord?id=CVE-2021-43975 Référence CVE CVE-2021-43976 https://www.cve.org/CVERecord?id=CVE-2021-43976 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45485 https://www.cve.org/CVERecord?id=CVE-2021-45485 Référence CVE CVE-2021-45486 https://www.cve.org/CVERecord?id=CVE-2021-45486 Référence CVE CVE-2022-0286 https://www.cve.org/CVERecord?id=CVE-

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-140Multiples vulnérabilités dans le noyau Linux d'Ubuntu

org/CVERecord?id=CVE-2021-28714 Référence CVE CVE-2021-28715 https://www.cve.org/CVERecord?id=CVE-2021-28715 Référence CVE CVE-2021-3640 https://www.cve.org/CVERecord?id=CVE-2021-3640 Référence CVE CVE-2021-3752 https://www.cve.org/CVERecord?id=CVE-2021-3752 Référence CVE CVE-2021-39685 https://www.cve.org/CVERecord?id=CVE-2021-39685 Référence CVE CVE-2021-4001 https://www.cve.org/CVERecord?id=CVE-2021-4001 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4155 https://www.cve.org/CVERecord?id=CVE-2021-4155 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-42739 https://www.cve.org/CVERecord?id=CVE-2021-42739 Référence CVE CVE-2021-43975 https://www.cve.org/CVERecord?id=CVE-2021-43975 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45095 https://www.cve.org/CVERecord?id=CVE-2021-45095 Référence CVE CVE-2021-45480 https://www.cve.org/CVERecord?id=CVE-2021-45480 Référence CVE CVE-2022-0264 https://www.cve.org/CVERecord?id=CVE-2022-0264 Référence CVE CVE-2022-0330 https://www.cve.org/CVERecord?id=CVE-2022-0330 Référence CVE CVE-2022-0382 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-108Multiples vulnérabilités dans le noyau Linux de SUSE

org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-3702 https://www.cve.org/CVERecord?id=CVE-2020-3702 Référence CVE CVE-2021-23134 https://www.cve.org/CVERecord?id=CVE-2021-23134 Référence CVE CVE-2021-4028 https://www.cve.org/CVERecord?id=CVE-2021-4028 Référence CVE CVE-2021-4083 https://www.cve.org/CVERecord?id=CVE-2021-4083 Référence CVE CVE-2021-4135 https://www.cve.org/CVERecord?id=CVE-2021-4135 Référence CVE CVE-2021-4149 https://www.cve.org/CVERecord?id=CVE-2021-4149 Référence CVE CVE-2021-4154 https://www.cve.org/CVERecord?id=CVE-2021-4154 Référence CVE CVE-2021-4197 https://www.cve.org/CVERecord?id=CVE-2021-4197 Référence CVE CVE-2021-4202 https://www.cve.org/CVERecord?id=CVE-2021-4202 Référence CVE CVE-2021-42739 https://www.cve.org/CVERecord?id=CVE-2021-42739 Référence CVE CVE-2021-44733 https://www.cve.org/CVERecord?id=CVE-2021-44733 Référence CVE CVE-2021-45485 https://www.cve.org/CVERecord?id=CVE-2021-45485 Référence CVE CVE-2021-45486 https://www.cve.org/CVERecord?id=CVE-2021-45486 Référence CVE CVE-2021-46283 https://www.cve.org/CVERecord?id=CVE-2021-46283 Référence CVE CVE-2022-0185 https://www.cve.org/CVERecord?id=CVE-2022-0185 Référence CVE CVE-2022-0322 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-080Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et une atteinte à l'intégrité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-019487Linux Kernel における認証に関する脆弱性

Linux Kernel には、認証に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 23 Mar 2022 · Last source change 3 Aug 2024, 17:16 UTC · CWE-287 · Improper Authentication

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-34056
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    SUSE Product Security Team ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Remediation guidance recorded
ENISA EUVD · EUVD-2021-34056↗SUSE Product Security Team security advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-4197 · cve.blacktree.nl