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Full vulnerability report · 2022
CVE-2022-40476High confidence

A local user could use this flaw to crash the system or potentially cause a denial of service

n/a · n/a

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
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-2022-43754

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 issue was discovered in fs/io_uring.c in the Linux kernel before 5.15.62. A local user could use this flaw to crash the system or potentially cause a denial of service.

What

A null pointer dereference issue was discovered in fs/io_uring.c in the Linux kernel before 5.15.62. A local user could use this flaw to crash the system or potentially cause 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 issue was discovered in fs/io_uring.c in the Linux kernel before 5.15.62. A local user could use this flaw to crash the system or potentially cause 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-2022-1655Linux 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-2022-AVI-1125Multiples vulnérabilités dans le noyau Linux de SUSE

Record?id=CVE-2022-3649 Référence CVE CVE-2022-36879 https://www.cve.org/CVERecord?id=CVE-2022-36879 Référence CVE CVE-2022-36946 https://www.cve.org/CVERecord?id=CVE-2022-36946 Référence CVE CVE-2022-3707 https://www.cve.org/CVERecord?id=CVE-2022-3707 Référence CVE CVE-2022-3903 https://www.cve.org/CVERecord?id=CVE-2022-3903 Référence CVE CVE-2022-39188 https://www.cve.org/CVERecord?id=CVE-2022-39188 Référence CVE CVE-2022-39189 https://www.cve.org/CVERecord?id=CVE-2022-39189 Référence CVE CVE-2022-39190 https://www.cve.org/CVERecord?id=CVE-2022-39190 Référence CVE CVE-2022-40307 https://www.cve.org/CVERecord?id=CVE-2022-40307 Référence CVE CVE-2022-40476 https://www.cve.org/CVERecord?id=CVE-2022-40476 Référence CVE CVE-2022-40768 https://www.cve.org/CVERecord?id=CVE-2022-40768 Référence CVE CVE-2022-4095 https://www.cve.org/CVERecord?id=CVE-2022-4095 Référence CVE CVE-2022-41218 https://www.cve.org/CVERecord?id=CVE-2022-41218 Référence CVE CVE-2022-4129 https://www.cve.org/CVERecord?id=CVE-2022-4129 Référence CVE CVE-2022-4139 https://www.cve.org/CVERecord?id=CVE-2022-4139 Référence CVE CVE-2022-41674 https://www.cve.org/CVERecord?id=CVE-2022-41674 Référence CVE CVE-2022-41848 https://www.cve.org/CVERecord?id=CVE-2022-41848 Référence CVE CVE-2022-41849 https://www.cve.org/CVERecord?id=CVE-20

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1044Multiples vulnérabilités dans le noyau Linux de SUSE

ve.org/CVERecord?id=CVE-2022-3621 Référence CVE CVE-2022-3625 https://www.cve.org/CVERecord?id=CVE-2022-3625 Référence CVE CVE-2022-3628 https://www.cve.org/CVERecord?id=CVE-2022-3628 Référence CVE CVE-2022-3629 https://www.cve.org/CVERecord?id=CVE-2022-3629 Référence CVE CVE-2022-3633 https://www.cve.org/CVERecord?id=CVE-2022-3633 Référence CVE CVE-2022-3640 https://www.cve.org/CVERecord?id=CVE-2022-3640 Référence CVE CVE-2022-3646 https://www.cve.org/CVERecord?id=CVE-2022-3646 Référence CVE CVE-2022-3649 https://www.cve.org/CVERecord?id=CVE-2022-3649 Référence CVE CVE-2022-39189 https://www.cve.org/CVERecord?id=CVE-2022-39189 Référence CVE CVE-2022-40476 https://www.cve.org/CVERecord?id=CVE-2022-40476 Référence CVE CVE-2022-40768 https://www.cve.org/CVERecord?id=CVE-2022-40768 Référence CVE CVE-2022-42703 https://www.cve.org/CVERecord?id=CVE-2022-42703 Référence CVE CVE-2022-42722 https://www.cve.org/CVERecord?id=CVE-2022-42722 Référence CVE CVE-2022-43750 https://www.cve.org/CVERecord?id=CVE-2022-43750 Gestion détaillée du document le 21 novembre 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général d

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1035Multiples vulnérabilités dans le noyau Linux de SUSE

.cve.org/CVERecord?id=CVE-2022-3619 Référence CVE CVE-2022-3621 https://www.cve.org/CVERecord?id=CVE-2022-3621 Référence CVE CVE-2022-3625 https://www.cve.org/CVERecord?id=CVE-2022-3625 Référence CVE CVE-2022-3628 https://www.cve.org/CVERecord?id=CVE-2022-3628 Référence CVE CVE-2022-3629 https://www.cve.org/CVERecord?id=CVE-2022-3629 Référence CVE CVE-2022-3633 https://www.cve.org/CVERecord?id=CVE-2022-3633 Référence CVE CVE-2022-3640 https://www.cve.org/CVERecord?id=CVE-2022-3640 Référence CVE CVE-2022-3646 https://www.cve.org/CVERecord?id=CVE-2022-3646 Référence CVE CVE-2022-3649 https://www.cve.org/CVERecord?id=CVE-2022-3649 Référence CVE CVE-2022-40476 https://www.cve.org/CVERecord?id=CVE-2022-40476 Référence CVE CVE-2022-40768 https://www.cve.org/CVERecord?id=CVE-2022-40768 Référence CVE CVE-2022-41674 https://www.cve.org/CVERecord?id=CVE-2022-41674 Référence CVE CVE-2022-42703 https://www.cve.org/CVERecord?id=CVE-2022-42703 Référence CVE CVE-2022-42719 https://www.cve.org/CVERecord?id=CVE-2022-42719 Référence CVE CVE-2022-42720 https://www.cve.org/CVERecord?id=CVE-2022-42720 Référence CVE CVE-2022-42721 https://www.cve.org/CVERecord?id=CVE-2022-42721 Référence CVE CVE-2022-42722 https://www.cve.org/CVERecord?id=CVE-2022-42722 Référence CVE CVE-2022-43750 https://www.cve.org/CVERecord?id=

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
n/a
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
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 14 Sept 2022 · Last source change 3 Aug 2024, 12:21 UTC · CWE-476 · NULL Pointer Dereference

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-2022-43754
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
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
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2022-43754↗Patch or update reference↗Vendor 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-2022-40476 · cve.blacktree.nl