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Full vulnerability report · 2023
CVE-2023-6622High confidence

Kernel: null pointer dereference vulnerability in nft_dynset_init()

Red Hat · Red Hat Enterprise Linux 8

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

3 package states
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.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-fdeAffected, 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 record ↗Source updated 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspiAffected, 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 record ↗Source updated 9 Sept 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 record ↗Source updated 9 Sept 2026
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2023-58845

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 actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to trigger a denial of service.

What

A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to trigger a denial of service.

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

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

What

A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to trigger a denial of service.

Why

The product dereferences a pointer that it expects to be valid but is NULL.

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 → NULL Pointer Dereference → 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-476

CWE-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.

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:N/I:N/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.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.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-476
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2024-1226Red Hat OpenShift: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um Dateien zu manipulieren, einen Denial-of-Service-Zustand zu verursachen, beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern oder um weitere nicht spezifizierte Angriffe auszuführen.

Official advisory
BSI · German · WID-SEC-W-2023-3090Linux Kernel: Schwachstelle ermöglicht Denial of Service

Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0506Multiples vulnérabilités dans Juniper Secure Analytics

.cve.org/CVERecord?id=CVE-2023-6121 Référence CVE CVE-2023-6135 https://www.cve.org/CVERecord?id=CVE-2023-6135 Référence CVE CVE-2023-6176 https://www.cve.org/CVERecord?id=CVE-2023-6176 Référence CVE CVE-2023-6356 https://www.cve.org/CVERecord?id=CVE-2023-6356 Référence CVE CVE-2023-6535 https://www.cve.org/CVERecord?id=CVE-2023-6535 Référence CVE CVE-2023-6536 https://www.cve.org/CVERecord?id=CVE-2023-6536 Référence CVE CVE-2023-6546 https://www.cve.org/CVERecord?id=CVE-2023-6546 Référence CVE CVE-2023-6606 https://www.cve.org/CVERecord?id=CVE-2023-6606 Référence CVE CVE-2023-6610 https://www.cve.org/CVERecord?id=CVE-2023-6610 Référence CVE CVE-2023-6622 https://www.cve.org/CVERecord?id=CVE-2023-6622 Référence CVE CVE-2023-6817 https://www.cve.org/CVERecord?id=CVE-2023-6817 Référence CVE CVE-2023-6915 https://www.cve.org/CVERecord?id=CVE-2023-6915 Référence CVE CVE-2023-6931 https://www.cve.org/CVERecord?id=CVE-2023-6931 Référence CVE CVE-2023-6932 https://www.cve.org/CVERecord?id=CVE-2023-6932 Référence CVE CVE-2023-7192 https://www.cve.org/CVERecord?id=CVE-2023-7192 Référence CVE CVE-2024-0553 https://www.cve.org/CVERecord?id=CVE-2024-0553 Référence CVE CVE-2024-0565 https://www.cve.org/CVERecord?id=CVE-2024-0565 Référence CVE CVE-2024-0646 https://www.cve.org/CVERecord?id=CVE-2024-0646 Ré

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0498Multiples vulnérabilités dans les produits IBM

ecord?id=CVE-2023-52434 Référence CVE CVE-2023-52448 https://www.cve.org/CVERecord?id=CVE-2023-52448 Référence CVE CVE-2023-52489 https://www.cve.org/CVERecord?id=CVE-2023-52489 Référence CVE CVE-2023-52574 https://www.cve.org/CVERecord?id=CVE-2023-52574 Référence CVE CVE-2023-52580 https://www.cve.org/CVERecord?id=CVE-2023-52580 Référence CVE CVE-2023-52581 https://www.cve.org/CVERecord?id=CVE-2023-52581 Référence CVE CVE-2023-52620 https://www.cve.org/CVERecord?id=CVE-2023-52620 Référence CVE CVE-2023-6121 https://www.cve.org/CVERecord?id=CVE-2023-6121 Référence CVE CVE-2023-6176 https://www.cve.org/CVERecord?id=CVE-2023-6176 Référence CVE CVE-2023-6622 https://www.cve.org/CVERecord?id=CVE-2023-6622 Référence CVE CVE-2023-6915 https://www.cve.org/CVERecord?id=CVE-2023-6915 Référence CVE CVE-2023-6932 https://www.cve.org/CVERecord?id=CVE-2023-6932 Référence CVE CVE-2024-0841 https://www.cve.org/CVERecord?id=CVE-2024-0841 Référence CVE CVE-2024-22257 https://www.cve.org/CVERecord?id=CVE-2024-22257 Référence CVE CVE-2024-22262 https://www.cve.org/CVERecord?id=CVE-2024-22262 Référence CVE CVE-2024-25742 https://www.cve.org/CVERecord?id=CVE-2024-25742 Référence CVE CVE-2024-25743 https://www.cve.org/CVERecord?id=CVE-2024-25743 Référence CVE CVE-2024-26602 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0438Multiples vulnérabilités dans le noyau Linux de Red Hat

ecord?id=CVE-2023-52434 Référence CVE CVE-2023-52448 https://www.cve.org/CVERecord?id=CVE-2023-52448 Référence CVE CVE-2023-52489 https://www.cve.org/CVERecord?id=CVE-2023-52489 Référence CVE CVE-2023-52574 https://www.cve.org/CVERecord?id=CVE-2023-52574 Référence CVE CVE-2023-52580 https://www.cve.org/CVERecord?id=CVE-2023-52580 Référence CVE CVE-2023-52581 https://www.cve.org/CVERecord?id=CVE-2023-52581 Référence CVE CVE-2023-52620 https://www.cve.org/CVERecord?id=CVE-2023-52620 Référence CVE CVE-2023-6121 https://www.cve.org/CVERecord?id=CVE-2023-6121 Référence CVE CVE-2023-6176 https://www.cve.org/CVERecord?id=CVE-2023-6176 Référence CVE CVE-2023-6622 https://www.cve.org/CVERecord?id=CVE-2023-6622 Référence CVE CVE-2023-6915 https://www.cve.org/CVERecord?id=CVE-2023-6915 Référence CVE CVE-2023-6932 https://www.cve.org/CVERecord?id=CVE-2023-6932 Référence CVE CVE-2024-0841 https://www.cve.org/CVERecord?id=CVE-2024-0841 Référence CVE CVE-2024-1086 https://www.cve.org/CVERecord?id=CVE-2024-1086 Référence CVE CVE-2024-25742 https://www.cve.org/CVERecord?id=CVE-2024-25742 Référence CVE CVE-2024-25743 https://www.cve.org/CVERecord?id=CVE-2024-25743 Référence CVE CVE-2024-26602 https://www.cve.org/CVERecord?id=CVE-2024-26602 Référence CVE CVE-2024-26609 https://www.cve.org/CVERecord?id=CVE-2024-

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0364Multiples vulnérabilités dans le noyau Linux de RedHat

g/CVERecord?id=CVE-2023-52580 Référence CVE CVE-2023-52581 https://www.cve.org/CVERecord?id=CVE-2023-52581 Référence CVE CVE-2023-52610 https://www.cve.org/CVERecord?id=CVE-2023-52610 Référence CVE CVE-2023-52620 https://www.cve.org/CVERecord?id=CVE-2023-52620 Référence CVE CVE-2023-6040 https://www.cve.org/CVERecord?id=CVE-2023-6040 Référence CVE CVE-2023-6121 https://www.cve.org/CVERecord?id=CVE-2023-6121 Référence CVE CVE-2023-6176 https://www.cve.org/CVERecord?id=CVE-2023-6176 Référence CVE CVE-2023-6531 https://www.cve.org/CVERecord?id=CVE-2023-6531 Référence CVE CVE-2023-6546 https://www.cve.org/CVERecord?id=CVE-2023-6546 Référence CVE CVE-2023-6622 https://www.cve.org/CVERecord?id=CVE-2023-6622 Référence CVE CVE-2023-6915 https://www.cve.org/CVERecord?id=CVE-2023-6915 Référence CVE CVE-2023-6931 https://www.cve.org/CVERecord?id=CVE-2023-6931 Référence CVE CVE-2023-6932 https://www.cve.org/CVERecord?id=CVE-2023-6932 Référence CVE CVE-2024-0565 https://www.cve.org/CVERecord?id=CVE-2024-0565 Référence CVE CVE-2024-0841 https://www.cve.org/CVERecord?id=CVE-2024-0841 Référence CVE CVE-2024-1085 https://www.cve.org/CVERecord?id=CVE-2024-1085 Référence CVE CVE-2024-1086 https://www.cve.org/CVERecord?id=CVE-2024-1086 Référence CVE CVE-2024-25742 https://www.cve.org/CVERecord?id=CVE-2024-25742

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0178Multiples 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 élévation de privilèges, un déni de service à distance et une exécution de code arbitraire.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0163Multiples vulnérabilités dans le noyau Linux d'Ubuntu

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

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0143Multiples vulnérabilités dans le noyau Linux Ubuntu

e.org/CVERecord?id=CVE-2023-51781 Référence CVE CVE-2023-51782 https://www.cve.org/CVERecord?id=CVE-2023-51782 Référence CVE CVE-2023-5717 https://www.cve.org/CVERecord?id=CVE-2023-5717 Référence CVE CVE-2023-6039 https://www.cve.org/CVERecord?id=CVE-2023-6039 Référence CVE CVE-2023-6040 https://www.cve.org/CVERecord?id=CVE-2023-6040 Référence CVE CVE-2023-6121 https://www.cve.org/CVERecord?id=CVE-2023-6121 Référence CVE CVE-2023-6176 https://www.cve.org/CVERecord?id=CVE-2023-6176 Référence CVE CVE-2023-6531 https://www.cve.org/CVERecord?id=CVE-2023-6531 Référence CVE CVE-2023-6606 https://www.cve.org/CVERecord?id=CVE-2023-6606 Référence CVE CVE-2023-6622 https://www.cve.org/CVERecord?id=CVE-2023-6622 Référence CVE CVE-2023-6817 https://www.cve.org/CVERecord?id=CVE-2023-6817 Référence CVE CVE-2023-6931 https://www.cve.org/CVERecord?id=CVE-2023-6931 Référence CVE CVE-2023-6932 https://www.cve.org/CVERecord?id=CVE-2023-6932 Référence CVE CVE-2024-0193 https://www.cve.org/CVERecord?id=CVE-2024-0193 Référence CVE CVE-2024-0565 https://www.cve.org/CVERecord?id=CVE-2024-0565 Référence CVE CVE-2024-0607 https://www.cve.org/CVERecord?id=CVE-2024-0607 Référence CVE CVE-2024-0641 https://www.cve.org/CVERecord?id=CVE-2024-0641 Référence CVE CVE-2024-0646 https://www.cve.org/CVERecord?id=CVE-2024-0646 Ré

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0114Multiples vulnérabilités dans le noyau Linux Ubuntu

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

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0055Multiples 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 à distance et un contournement de la politique de sécurité.

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.
Patch available
Affected
See the vendor and CVE records for the affected range.
Fixed
0:4.18.0-553.rt7.342.el8_10 < *; 0:4.18.0-553.el8_10 < *; 0:5.14.0-427.13.1.el9_4 < *
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 8 Dec 2023 · Last source change 6 Nov 2025, 19:47 UTC · CWE-476 · NULL Pointer Dereference

CVE recordCVE.org · 5.2
CVSS sourceCNA
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-2023-58845
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Missing structured fields: affected versions. 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
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-2023-6622 · cve.blacktree.nl