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Full vulnerability report · 2025
CVE-2023-53209High confidence

wifi: mac80211_hwsim: Fix possible NULL dereference

Linux · Linux

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.

9 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-6.11Affected, 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcp-6.11Affected, 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-hwe-6.11Affected, 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-intelAffected, 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatency-hwe-6.11Affected, 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.11Affected, 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 11 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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-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 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-riscvAffected, 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 11 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-2023-59874

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

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it.

What

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it.

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 cause the confidentiality, integrity or availability impact described by the vendor.

What

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it.

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 cause the confidentiality, integrity or availability impact described by the vendor.

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 → cause the confidentiality, integrity or availability impact described by the vendor
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.
CWE-476
A

Official authority intelligence

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

BSI · German · WID-SEC-2025-2053Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder nicht näher beschriebene Auswirkungen zu erzielen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20250917SECURITY BULLETIN 17 SEPT 2025

The Cyber Security Agency of Singapore included this CVE in its official SECURITY BULLETIN 17 SEPT 2025, published on 17 September 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0326Multiples vulnérabilités dans les produits VMware

d?id=CVE-2023-53105 Référence CVE CVE-2023-53115 https://www.cve.org/CVERecord?id=CVE-2023-53115 Référence CVE CVE-2023-53149 https://www.cve.org/CVERecord?id=CVE-2023-53149 Référence CVE CVE-2023-53152 https://www.cve.org/CVERecord?id=CVE-2023-53152 Référence CVE CVE-2023-53168 https://www.cve.org/CVERecord?id=CVE-2023-53168 Référence CVE CVE-2023-53178 https://www.cve.org/CVERecord?id=CVE-2023-53178 Référence CVE CVE-2023-53180 https://www.cve.org/CVERecord?id=CVE-2023-53180 Référence CVE CVE-2023-53187 https://www.cve.org/CVERecord?id=CVE-2023-53187 Référence CVE CVE-2023-53198 https://www.cve.org/CVERecord?id=CVE-2023-53198 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53218 https://www.cve.org/CVERecord?id=CVE-2023-53218 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=CVE-2023-53221 Référence CVE CVE-2023-53231 https://www.cve.org/CVERecord?id=CVE-2023-53231 Référence CVE CVE-2023-53240 https://www.cve.org/CVERecord?id=CVE-2023-53240 Référence CVE CVE-2023-53247 https://www.cve.org/CVERecord?id=CVE-2023-53247 Référence CVE CVE-2023-53248 https://www.cve.org/CVERecord?id=CVE-2023-53248 Référence CVE CVE-2023-53254 https://www.cve.org/CVERecord?id=CVE-2023-53254 Référence CVE CVE-2023-53258 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0316Multiples vulnérabilités dans les produits VMware

d?id=CVE-2023-53105 Référence CVE CVE-2023-53115 https://www.cve.org/CVERecord?id=CVE-2023-53115 Référence CVE CVE-2023-53149 https://www.cve.org/CVERecord?id=CVE-2023-53149 Référence CVE CVE-2023-53152 https://www.cve.org/CVERecord?id=CVE-2023-53152 Référence CVE CVE-2023-53168 https://www.cve.org/CVERecord?id=CVE-2023-53168 Référence CVE CVE-2023-53178 https://www.cve.org/CVERecord?id=CVE-2023-53178 Référence CVE CVE-2023-53180 https://www.cve.org/CVERecord?id=CVE-2023-53180 Référence CVE CVE-2023-53187 https://www.cve.org/CVERecord?id=CVE-2023-53187 Référence CVE CVE-2023-53198 https://www.cve.org/CVERecord?id=CVE-2023-53198 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53218 https://www.cve.org/CVERecord?id=CVE-2023-53218 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=CVE-2023-53221 Référence CVE CVE-2023-53231 https://www.cve.org/CVERecord?id=CVE-2023-53231 Référence CVE CVE-2023-53240 https://www.cve.org/CVERecord?id=CVE-2023-53240 Référence CVE CVE-2023-53247 https://www.cve.org/CVERecord?id=CVE-2023-53247 Référence CVE CVE-2023-53248 https://www.cve.org/CVERecord?id=CVE-2023-53248 Référence CVE CVE-2023-53254 https://www.cve.org/CVERecord?id=CVE-2023-53254 Référence CVE CVE-2023-53258 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1078Multiples vulnérabilités dans les produits Microsoft

0215 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40217 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40218 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40219 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40220 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-61729 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-66293 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-66476 du 05 décembre 2025 Bulletin de sécurité Microsoft CVE-2022-50303 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2022-50304 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2023-53209 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2023-53231 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-12084 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-12385 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40223 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40233 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40240 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40242 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40243 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-2025-40244 du 06 décembre 2025 Bulletin de sécurité Microsoft CVE-

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1032Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53192 Référence CVE CVE-2023-53195 https://www.cve.org/CVERecord?id=CVE-2023-53195 Référence CVE CVE-2023-53196 https://www.cve.org/CVERecord?id=CVE-2023-53196 Référence CVE CVE-2023-53201 https://www.cve.org/CVERecord?id=CVE-2023-53201 Référence CVE CVE-2023-53204 https://www.cve.org/CVERecord?id=CVE-2023-53204 Référence CVE CVE-2023-53205 https://www.cve.org/CVERecord?id=CVE-2023-53205 Référence CVE CVE-2023-53206 https://www.cve.org/CVERecord?id=CVE-2023-53206 Référence CVE CVE-2023-53207 https://www.cve.org/CVERecord?id=CVE-2023-53207 Référence CVE CVE-2023-53208 https://www.cve.org/CVERecord?id=CVE-2023-53208 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53210 https://www.cve.org/CVERecord?id=CVE-2023-53210 Référence CVE CVE-2023-53215 https://www.cve.org/CVERecord?id=CVE-2023-53215 Référence CVE CVE-2023-53217 https://www.cve.org/CVERecord?id=CVE-2023-53217 Référence CVE CVE-2023-53220 https://www.cve.org/CVERecord?id=CVE-2023-53220 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=CVE-2023-53221 Référence CVE CVE-2023-53222 https://www.cve.org/CVERecord?id=CVE-2023-53222 Référence CVE CVE-2023-53226 https://www.cve.org/CVERecord?id=CVE-2023-53226 Référence CVE CVE-2023-53230 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1009Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53192 Référence CVE CVE-2023-53195 https://www.cve.org/CVERecord?id=CVE-2023-53195 Référence CVE CVE-2023-53196 https://www.cve.org/CVERecord?id=CVE-2023-53196 Référence CVE CVE-2023-53201 https://www.cve.org/CVERecord?id=CVE-2023-53201 Référence CVE CVE-2023-53204 https://www.cve.org/CVERecord?id=CVE-2023-53204 Référence CVE CVE-2023-53205 https://www.cve.org/CVERecord?id=CVE-2023-53205 Référence CVE CVE-2023-53206 https://www.cve.org/CVERecord?id=CVE-2023-53206 Référence CVE CVE-2023-53207 https://www.cve.org/CVERecord?id=CVE-2023-53207 Référence CVE CVE-2023-53208 https://www.cve.org/CVERecord?id=CVE-2023-53208 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53210 https://www.cve.org/CVERecord?id=CVE-2023-53210 Référence CVE CVE-2023-53215 https://www.cve.org/CVERecord?id=CVE-2023-53215 Référence CVE CVE-2023-53217 https://www.cve.org/CVERecord?id=CVE-2023-53217 Référence CVE CVE-2023-53220 https://www.cve.org/CVERecord?id=CVE-2023-53220 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=CVE-2023-53221 Référence CVE CVE-2023-53222 https://www.cve.org/CVERecord?id=CVE-2023-53222 Référence CVE CVE-2023-53226 https://www.cve.org/CVERecord?id=CVE-2023-53226 Référence CVE CVE-2023-53230 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0921Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53196 Référence CVE CVE-2023-53197 https://www.cve.org/CVERecord?id=CVE-2023-53197 Référence CVE CVE-2023-53199 https://www.cve.org/CVERecord?id=CVE-2023-53199 Référence CVE CVE-2023-53201 https://www.cve.org/CVERecord?id=CVE-2023-53201 Référence CVE CVE-2023-53204 https://www.cve.org/CVERecord?id=CVE-2023-53204 Référence CVE CVE-2023-53205 https://www.cve.org/CVERecord?id=CVE-2023-53205 Référence CVE CVE-2023-53206 https://www.cve.org/CVERecord?id=CVE-2023-53206 Référence CVE CVE-2023-53207 https://www.cve.org/CVERecord?id=CVE-2023-53207 Référence CVE CVE-2023-53208 https://www.cve.org/CVERecord?id=CVE-2023-53208 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53210 https://www.cve.org/CVERecord?id=CVE-2023-53210 Référence CVE CVE-2023-53213 https://www.cve.org/CVERecord?id=CVE-2023-53213 Référence CVE CVE-2023-53215 https://www.cve.org/CVERecord?id=CVE-2023-53215 Référence CVE CVE-2023-53216 https://www.cve.org/CVERecord?id=CVE-2023-53216 Référence CVE CVE-2023-53217 https://www.cve.org/CVERecord?id=CVE-2023-53217 Référence CVE CVE-2023-53219 https://www.cve.org/CVERecord?id=CVE-2023-53219 Référence CVE CVE-2023-53220 https://www.cve.org/CVERecord?id=CVE-2023-53220 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0895Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53196 Référence CVE CVE-2023-53197 https://www.cve.org/CVERecord?id=CVE-2023-53197 Référence CVE CVE-2023-53199 https://www.cve.org/CVERecord?id=CVE-2023-53199 Référence CVE CVE-2023-53201 https://www.cve.org/CVERecord?id=CVE-2023-53201 Référence CVE CVE-2023-53204 https://www.cve.org/CVERecord?id=CVE-2023-53204 Référence CVE CVE-2023-53205 https://www.cve.org/CVERecord?id=CVE-2023-53205 Référence CVE CVE-2023-53206 https://www.cve.org/CVERecord?id=CVE-2023-53206 Référence CVE CVE-2023-53207 https://www.cve.org/CVERecord?id=CVE-2023-53207 Référence CVE CVE-2023-53208 https://www.cve.org/CVERecord?id=CVE-2023-53208 Référence CVE CVE-2023-53209 https://www.cve.org/CVERecord?id=CVE-2023-53209 Référence CVE CVE-2023-53210 https://www.cve.org/CVERecord?id=CVE-2023-53210 Référence CVE CVE-2023-53213 https://www.cve.org/CVERecord?id=CVE-2023-53213 Référence CVE CVE-2023-53215 https://www.cve.org/CVERecord?id=CVE-2023-53215 Référence CVE CVE-2023-53216 https://www.cve.org/CVERecord?id=CVE-2023-53216 Référence CVE CVE-2023-53217 https://www.cve.org/CVERecord?id=CVE-2023-53217 Référence CVE CVE-2023-53219 https://www.cve.org/CVERecord?id=CVE-2023-53219 Référence CVE CVE-2023-53220 https://www.cve.org/CVERecord?id=CVE-2023-53220 Référence CVE CVE-2023-53221 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-030160Linux の Linux Kernel における NULL ポインタデリファレンスに関する脆弱性

Linux の Linux Kernel には、NULL ポインタデリファレンス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.
Patch available
Affected
Linux: 86e74a08fecb59985bb2d5fe3e96dc108822a420 < d0124848c7940aba73492e282506b32a13f2e30e, 86e74a08fecb59985bb2d5fe3e96dc108822a420 < a8a20fed3e05b3a6866c5c58855deaf3c217ccd6, 86e74a08fecb59985bb2d5fe3e96dc108822a420 < 0cc80943ef518a1c51a1111e9346d1daf11dd545, 6.1
Fixed
Linux: < 6.1, 6.1.42 ≤ 6.1.*, 6.4.7 ≤ 6.4.*, 6.5 ≤ *
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 15 Sept 2025 · Last source change 11 May 2026, 19:40 UTC · CWE-476 · NULL Pointer Dereference

CVE recordCVE.org · 5.2
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-2023-59874
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

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-2023-53209 · cve.blacktree.nl