BlackTreeCVE Intelligence
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Full vulnerability report · 2021
CVE-2020-25671High confidence

A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations

Unknown · Linux Kernel

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

High technical severity with public exploit material referenced by a structured source; 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:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.51% 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.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Linux 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: Within 30 daysRemediation target: Within 180 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.5.10.38-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.10.38-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.10.38-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.5.10.38-1Debian 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-2020-25671 · CSAF 2.0 · revision 43 · interimSUSE Product Security TeamCVE-2020-25671
12 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 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 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
  • SLES 15 SP4 CHOST Images for Microsoft Azure
  • SLES 15 SP5 CHOST Images for Microsoft Azure
Summary
A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.
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-2020-18333

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 with public exploit material referenced by a structured source; 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

A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.

What

A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

What

A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Use After Free → gain additional privileges
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-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

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.
Privilege escalationCWE-416Public exploit reference
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20210602Security Bulletin 02 Jun 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 02 Jun 2021, published on 2 June 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

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

22 mars 2022 https://ubuntu.com/security/notices/USN-5339-1 Bulletin de sécurité le noyau Linux de Ubuntu USN-5343-1 du 22 mars 2022 https://ubuntu.com/security/notices/USN-5343-1 Référence CVE CVE-2016-2853 https://www.cve.org/CVERecord?id=CVE-2016-2853 Référence CVE CVE-2016-2854 https://www.cve.org/CVERecord?id=CVE-2016-2854 Référence CVE CVE-2018-5995 https://www.cve.org/CVERecord?id=CVE-2018-5995 Référence CVE CVE-2019-19449 https://www.cve.org/CVERecord?id=CVE-2019-19449 Référence CVE CVE-2020-12655 https://www.cve.org/CVERecord?id=CVE-2020-12655 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-26139 https://www.cve.org/CVERecord?id=CVE-2020-26139 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-26555 https://www.cve.org/CVERecord?id=CVE-2020-26555 Référence CVE CVE-2020-26558 https://www.cve.org/CVERecord?id=CVE-2020-26558 Référence CVE CVE-2020-36322 https://www.cve.org/CVERecord?id=CVE-2020-36322 Référence CVE CVE-2020-36385 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-114Multiples 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 déni de service, un contournement de la politique de sécurité et une atteinte à la confidentialité des données.

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

u 02 février 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20220293-1/ Bulletin de sécurité SUSE 20220295-1 du 02 février 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20220295-1/ Bulletin de sécurité SUSE 20220296-1 du 02 février 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20220296-1/ Bulletin de sécurité SUSE 20220298-1 du 02 février 2022 https://www.suse.com/support/update/announcement/2022/suse-su-20220298-1/ Référence CVE CVE-2018-25020 https://www.cve.org/CVERecord?id=CVE-2018-25020 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.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-

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-100Multiples 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 ↗
CERT-FR · French · CERTFR-2021-AVI-482Multiples vulnérabilités dans le noyau Linux de Debian LTS

r au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Debian LTS dla-2689 du 22 juin 2021 https://www.debian.org/lts/security/2021/dla-2689 Bulletin de sécurité Debian LTS dla-2690 du 22 juin 2021 https://www.debian.org/lts/security/2021/dla-2690 Référence CVE CVE-2020-24586 https://www.cve.org/CVERecord?id=CVE-2020-24586 Référence CVE CVE-2020-24587 https://www.cve.org/CVERecord?id=CVE-2020-24587 Référence CVE CVE-2020-24588 https://www.cve.org/CVERecord?id=CVE-2020-24588 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-26139 https://www.cve.org/CVERecord?id=CVE-2020-26139 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-26558 https://www.cve.org/CVERecord?id=CVE-2020-26558 Référence CVE CVE-2020-29374 https://www.cve.org/CVERecord?id=CVE-2020-29374 Référence CVE CVE-2020-36322 https://www.cve.org/CVERecord?id=CVE-2020-36322 Référence CVE CVE-2021-0129 https://www.cve.org/CVERecord?id=CVE-2021-0129 Référence CVE CVE-2021-20292 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-483Multiples vulnérabilités dans le noyau Linux d'Ubuntu

Linux d'Ubuntu USN-5001-1 du 23 juin 2021 https://ubuntu.com/security/notices/USN-5001-1 Bulletin de sécurité le noyau Linux d'Ubuntu USN-5002-1 du 23 juin 2021 https://ubuntu.com/security/notices/USN-5002-1 Bulletin de sécurité le noyau Linux d'Ubuntu USN-5003-1 du 23 juin 2021 https://ubuntu.com/security/notices/USN-5003-1 Référence CVE CVE-2020-24586 https://www.cve.org/CVERecord?id=CVE-2020-24586 Référence CVE CVE-2020-24587 https://www.cve.org/CVERecord?id=CVE-2020-24587 Référence CVE CVE-2020-24588 https://www.cve.org/CVERecord?id=CVE-2020-24588 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-26139 https://www.cve.org/CVERecord?id=CVE-2020-26139 Référence CVE CVE-2020-26141 https://www.cve.org/CVERecord?id=CVE-2020-26141 Référence CVE CVE-2020-26145 https://www.cve.org/CVERecord?id=CVE-2020-26145 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2021-23133 https://www.cve.org/CVERecord?id=CVE-2021-23133 Référence CVE CVE-2021-23134 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-469Multiples vulnérabilités dans le noyau Linux de SUSE

e/announcement/2021/suse-su-20211975-1 Bulletin de sécurité SUSE suse-su-20211977-1 du 15 juin 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211977-1/ Référence CVE CVE-2019-18814 https://www.cve.org/CVERecord?id=CVE-2019-18814 Référence CVE CVE-2019-19769 https://www.cve.org/CVERecord?id=CVE-2019-19769 Référence CVE CVE-2020-24586 https://www.cve.org/CVERecord?id=CVE-2020-24586 Référence CVE CVE-2020-24587 https://www.cve.org/CVERecord?id=CVE-2020-24587 Référence CVE CVE-2020-24588 https://www.cve.org/CVERecord?id=CVE-2020-24588 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-26139 https://www.cve.org/CVERecord?id=CVE-2020-26139 Référence CVE CVE-2020-26141 https://www.cve.org/CVERecord?id=CVE-2020-26141 Référence CVE CVE-2020-26145 https://www.cve.org/CVERecord?id=CVE-2020-26145 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-27170 https://www.cve.org/CVERecord?id=CVE-2020-27170 Référence CVE CVE-2020-27171 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-436Multiples vulnérabilités dans le noyau Linux d'Ubuntu

uant de provoquer une exécution de code arbitraire, un déni de service et une atteinte à la confidentialité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Ubuntu USN-4982-1 du 03 juin 2021 https://ubuntu.com/security/notices/USN-4982-1 Bulletin de sécurité Ubuntu USN-4983-1 du 03 juin 2021 https://ubuntu.com/security/notices/USN-4983-1 Bulletin de sécurité Ubuntu USN-4984-1 du 04 juin 2021 https://ubuntu.com/security/notices/USN-4984-1 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2021-28038 https://www.cve.org/CVERecord?id=CVE-2021-28038 Référence CVE CVE-2021-28660 https://www.cve.org/CVERecord?id=CVE-2021-28660 Référence CVE CVE-2021-28688 https://www.cve.org/CVERecord?id=CVE-2021-28688 Référence CVE CVE-2021-28950 https://www.cve.org/CVERecord?id=CVE-2021-28950 Référence CVE CVE-2021-28952 https://www.cve.org/CVERecord?id=CVE-2021-28952 Référence CVE CVE-2021-28964 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-432Multiples 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 l'intégrité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-392Multiples vulnérabilités dans le noyau Linux de SUSE

écurité SUSE suse-su-20211624-1 du 18 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211624-1/ Bulletin de sécurité SUSE suse-su-20211625-1 du 18 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211625-1/ Référence CVE CVE-2019-18814 https://www.cve.org/CVERecord?id=CVE-2019-18814 Référence CVE CVE-2019-19769 https://www.cve.org/CVERecord?id=CVE-2019-19769 Référence CVE CVE-2020-0433 https://www.cve.org/CVERecord?id=CVE-2020-0433 Référence CVE CVE-2020-1749 https://www.cve.org/CVERecord?id=CVE-2020-1749 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-27170 https://www.cve.org/CVERecord?id=CVE-2020-27170 Référence CVE CVE-2020-27171 https://www.cve.org/CVERecord?id=CVE-2020-27171 Référence CVE CVE-2020-27673 https://www.cve.org/CVERecord?id=CVE-2020-27673 Référence CVE CVE-2020-27815 https://www.cve.org/CVERecord?id=CVE-2020-27815 Référence CVE CVE-2020-35519 https://www.cve.org/CVERecord?id=CVE-2020-35519 Référence CVE CVE-2020-36310 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-387Multiples vulnérabilités dans le noyau Linux de SUSE

tation Bulletin de sécurité SUSE suse-su-20211605-1 du 14 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211605-1/ Bulletin de sécurité SUSE suse-su-20211617-1 du 17 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211617-1/ Bulletin de sécurité SUSE suse-su-20211622-1 du 17 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211622-1/ Référence CVE CVE-2020-0433 https://www.cve.org/CVERecord?id=CVE-2020-0433 Référence CVE CVE-2020-1749 https://www.cve.org/CVERecord?id=CVE-2020-1749 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-36310 https://www.cve.org/CVERecord?id=CVE-2020-36310 Référence CVE CVE-2020-36312 https://www.cve.org/CVERecord?id=CVE-2020-36312 Référence CVE CVE-2020-36322 https://www.cve.org/CVERecord?id=CVE-2020-36322 Référence CVE CVE-2021-20219 https://www.cve.org/CVERecord?id=CVE-2021-20219 Référence CVE CVE-2021-27363 https://www.cve.org/CVERecord?id=CVE-2021-27363 Référence CVE CVE-2021-27364 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-372Multiples vulnérabilités dans le noyau Linux d'Ubuntu

untu USN-4946-1 du 11 mai 2021 https://ubuntu.com/security/notices/USN-4946-1 Bulletin de sécurité Ubuntu USN-4947-1 du 11 mai 2021 https://ubuntu.com/security/notices/USN-4947-1 Bulletin de sécurité Ubuntu USN-4948-1 du 11 mai 2021 https://ubuntu.com/security/notices/USN-4948-1 Bulletin de sécurité Ubuntu USN-4949-1 du 11 mai 2021 https://ubuntu.com/security/notices/USN-4949-1 Bulletin de sécurité Ubuntu USN-4950-1 du 11 mai 2021 https://ubuntu.com/security/notices/USN-4950-1 Référence CVE CVE-2020-25639 https://www.cve.org/CVERecord?id=CVE-2020-25639 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-35519 https://www.cve.org/CVERecord?id=CVE-2020-35519 Référence CVE CVE-2021-20292 https://www.cve.org/CVERecord?id=CVE-2021-20292 Référence CVE CVE-2021-26930 https://www.cve.org/CVERecord?id=CVE-2021-26930 Référence CVE CVE-2021-26931 https://www.cve.org/CVERecord?id=CVE-2021-26931 Référence CVE CVE-2021-28038 https://www.cve.org/CVERecord?id=CVE-2021-28038 Référence CVE CVE-2021-28375 https://www.cve.org/CVERecord?id=CVE-2021-28375 Référence CVE CVE-2021-28660 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-373Multiples vulnérabilités dans le noyau Linux de SUSE

ai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211573-1/ Bulletin de sécurité SUSE suse-su-20211574-1 du 12 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211574-1/ Bulletin de sécurité SUSE suse-su-20211595-1 du 13 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211595-1/ Bulletin de sécurité SUSE suse-su-20211596-1 du 13 mai 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211596-1/ Référence CVE CVE-2020-0433 https://www.cve.org/CVERecord?id=CVE-2020-0433 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-27170 https://www.cve.org/CVERecord?id=CVE-2020-27170 Référence CVE CVE-2020-27171 https://www.cve.org/CVERecord?id=CVE-2020-27171 Référence CVE CVE-2020-27673 https://www.cve.org/CVERecord?id=CVE-2020-27673 Référence CVE CVE-2020-27815 https://www.cve.org/CVERecord?id=CVE-2020-27815 Référence CVE CVE-2020-35519 https://www.cve.org/CVERecord?id=CVE-2020-35519 Référence CVE CVE-2020-36310 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-302Multiples 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, une exécution de code arbitraire et un déni de service.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-284Multiples vulnérabilités dans le noyau Linux de SUSE

Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité SUSE suse-su-20211238-1 du 16 avril 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211238-1/ Bulletin de sécurité SUSE suse-su-20211248-1 du 16 avril 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211248-1/ Référence CVE CVE-2019-18814 https://www.cve.org/CVERecord?id=CVE-2019-18814 Référence CVE CVE-2019-19769 https://www.cve.org/CVERecord?id=CVE-2019-19769 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-27170 https://www.cve.org/CVERecord?id=CVE-2020-27170 Référence CVE CVE-2020-27171 https://www.cve.org/CVERecord?id=CVE-2020-27171 Référence CVE CVE-2020-27815 https://www.cve.org/CVERecord?id=CVE-2020-27815 Référence CVE CVE-2020-35519 https://www.cve.org/CVERecord?id=CVE-2020-35519 Référence CVE CVE-2020-36310 https://www.cve.org/CVERecord?id=CVE-2020-36310 Référence CVE CVE-2020-36311 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-278Multiples vulnérabilités dans le noyau Linux de SUSE

des correctifs (cf. section Documentation). Documentation Bulletin de sécurité SUSE suse-su-20211210-1 du 15 avril 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211210-1/ Bulletin de sécurité SUSE suse-su-20211211-1 du 15 avril 2021 https://www.suse.com/support/update/announcement/2021/suse-su-20211211-1/ Référence CVE CVE-2019-18814 https://www.cve.org/CVERecord?id=CVE-2019-18814 Référence CVE CVE-2019-19769 https://www.cve.org/CVERecord?id=CVE-2019-19769 Référence CVE CVE-2020-0433 https://www.cve.org/CVERecord?id=CVE-2020-0433 Référence CVE CVE-2020-25670 https://www.cve.org/CVERecord?id=CVE-2020-25670 Référence CVE CVE-2020-25671 https://www.cve.org/CVERecord?id=CVE-2020-25671 Référence CVE CVE-2020-25672 https://www.cve.org/CVERecord?id=CVE-2020-25672 Référence CVE CVE-2020-25673 https://www.cve.org/CVERecord?id=CVE-2020-25673 Référence CVE CVE-2020-27170 https://www.cve.org/CVERecord?id=CVE-2020-27170 Référence CVE CVE-2020-27171 https://www.cve.org/CVERecord?id=CVE-2020-27171 Référence CVE CVE-2020-27815 https://www.cve.org/CVERecord?id=CVE-2020-27815 Référence CVE CVE-2020-29368 https://www.cve.org/CVERecord?id=CVE-2020-29368 Référence CVE CVE-2020-29374 https://www.cve.org/CVERecord?id=CVE-2020-29374 Référence CVE CVE-2020-35519 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-016805Linux Kernel における解放済みメモリの使用に関する脆弱性

Linux Kernel には、解放済みメモリの使用に関する脆弱性が存在します。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-016795Linux Kernel における解放済みメモリの使用に関する脆弱性

Linux Kernel には、解放済みメモリの使用に関する脆弱性が存在します。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-016780Linux Kernel における有効期限後のメモリの解放の欠如に関する脆弱性

Linux Kernel には、有効期限後のメモリの解放の欠如に関する脆弱性が存在します。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2020-016796Linux Kernel におけるリソースの枯渇に関する脆弱性

Linux Kernel には、リソースの枯渇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
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
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 26 May 2021 · Last source change 4 Aug 2024, 15:40 UTC · CWE-416 · Use After Free

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-2020-18333
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 ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2020-18333↗Vendor CSAF · SUSE Product Security Team↗Public exploit reference↗Public exploit 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-2020-25671 · cve.blacktree.nl