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Full vulnerability report · 2025
CVE-2023-4130High confidence

ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

Linux · Linux

8.1HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

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 4 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 4 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 4 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 4 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 4 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.8Affected, 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 4 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 4 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 4 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 4 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-2023-54012

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 actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

What

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path 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: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path 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
a network path → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
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.
CWE not yet assigned
CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.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.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
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
Network
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2025-1858Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder andere nicht spezifizierte Angriffe durchzuführen.

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

ERecord?id=CVE-2022-50467 Référence CVE CVE-2022-50468 https://www.cve.org/CVERecord?id=CVE-2022-50468 Référence CVE CVE-2022-50469 https://www.cve.org/CVERecord?id=CVE-2022-50469 Référence CVE CVE-2023-1380 https://www.cve.org/CVERecord?id=CVE-2023-1380 Référence CVE CVE-2023-28328 https://www.cve.org/CVERecord?id=CVE-2023-28328 Référence CVE CVE-2023-31248 https://www.cve.org/CVERecord?id=CVE-2023-31248 Référence CVE CVE-2023-3772 https://www.cve.org/CVERecord?id=CVE-2023-3772 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-39197 https://www.cve.org/CVERecord?id=CVE-2023-39197 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-42753 https://www.cve.org/CVERecord?id=CVE-2023-42753 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-52923 https://www.cve.org/CVERecord?id=CVE-2023-52923 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53148 https://www.cve.org/CVERecord?id=CVE-2023-53148 Référence CVE CVE-2023-53149 https://www.cve.org/CVERecord?id=CVE-2023-53149 Référence CVE CVE-2023-53150 https://www.cve.org/CVERecord?id=CVE-2023-53150 Référence CVE CVE-2023-53151 https://www.cve.org/CVERecord?id=CVE

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

ERecord?id=CVE-2022-50467 Référence CVE CVE-2022-50468 https://www.cve.org/CVERecord?id=CVE-2022-50468 Référence CVE CVE-2022-50469 https://www.cve.org/CVERecord?id=CVE-2022-50469 Référence CVE CVE-2023-1380 https://www.cve.org/CVERecord?id=CVE-2023-1380 Référence CVE CVE-2023-28328 https://www.cve.org/CVERecord?id=CVE-2023-28328 Référence CVE CVE-2023-31248 https://www.cve.org/CVERecord?id=CVE-2023-31248 Référence CVE CVE-2023-3772 https://www.cve.org/CVERecord?id=CVE-2023-3772 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-39197 https://www.cve.org/CVERecord?id=CVE-2023-39197 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-42753 https://www.cve.org/CVERecord?id=CVE-2023-42753 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-52923 https://www.cve.org/CVERecord?id=CVE-2023-52923 Référence CVE CVE-2023-53147 https://www.cve.org/CVERecord?id=CVE-2023-53147 Référence CVE CVE-2023-53148 https://www.cve.org/CVERecord?id=CVE-2023-53148 Référence CVE CVE-2023-53149 https://www.cve.org/CVERecord?id=CVE-2023-53149 Référence CVE CVE-2023-53150 https://www.cve.org/CVERecord?id=CVE-2023-53150 Référence CVE CVE-2023-53151 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0841Multiples vulnérabilités dans le noyau Linux de SUSE

é SUSE SUSE-SU-2025:03416-1 du 28 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503416-1 Bulletin de sécurité SUSE SUSE-SU-2025:03418-1 du 28 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503418-1 Bulletin de sécurité SUSE SUSE-SU-2025:03419-1 du 28 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503419-1 Référence CVE CVE-2022-49492 https://www.cve.org/CVERecord?id=CVE-2022-49492 Référence CVE CVE-2022-50116 https://www.cve.org/CVERecord?id=CVE-2022-50116 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-53117 https://www.cve.org/CVERecord?id=CVE-2023-53117 Référence CVE CVE-2024-26661 https://www.cve.org/CVERecord?id=CVE-2024-26661 Référence CVE CVE-2024-26808 https://www.cve.org/CVERecord?id=CVE-2024-26808 Référence CVE CVE-2024-42265 https://www.cve.org/CVERecord?id=CVE-2024-42265 Référence CVE CVE-2024-46733 https://www.cve.org/CVERecord?id=CVE-2024-46733 Référence CVE CVE-2024-49860 https://www.cve.org/CVERecord?id=CVE-2024-49860 Référence CVE CVE-2024-49996 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0827Multiples vulnérabilités dans le noyau Linux de SUSE

uncement/2025/suse-su-202503358-1 Bulletin de sécurité SUSE SUSE-SU-2025:03359-1 du 25 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503359-1 Référence CVE CVE-2022-29900 https://www.cve.org/CVERecord?id=CVE-2022-29900 Référence CVE CVE-2022-29901 https://www.cve.org/CVERecord?id=CVE-2022-29901 Référence CVE CVE-2022-49492 https://www.cve.org/CVERecord?id=CVE-2022-49492 Référence CVE CVE-2022-49980 https://www.cve.org/CVERecord?id=CVE-2022-49980 Référence CVE CVE-2022-50116 https://www.cve.org/CVERecord?id=CVE-2022-50116 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-53117 https://www.cve.org/CVERecord?id=CVE-2023-53117 Référence CVE CVE-2024-26661 https://www.cve.org/CVERecord?id=CVE-2024-26661 Référence CVE CVE-2024-26808 https://www.cve.org/CVERecord?id=CVE-2024-26808 Référence CVE CVE-2024-42265 https://www.cve.org/CVERecord?id=CVE-2024-42265 Référence CVE CVE-2024-46733 https://www.cve.org/CVERecord?id=CVE-2024-46733 Référence CVE CVE-2024-49860 https://www.cve.org/CVERecord?id=CVE-2024-49860 Référence CVE CVE-2024-49996 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0805Multiples vulnérabilités dans le noyau Linux de SUSE

ord?id=CVE-2022-50138 Référence CVE CVE-2022-50141 https://www.cve.org/CVERecord?id=CVE-2022-50141 Référence CVE CVE-2022-50162 https://www.cve.org/CVERecord?id=CVE-2022-50162 Référence CVE CVE-2022-50185 https://www.cve.org/CVERecord?id=CVE-2022-50185 Référence CVE CVE-2022-50191 https://www.cve.org/CVERecord?id=CVE-2022-50191 Référence CVE CVE-2022-50211 https://www.cve.org/CVERecord?id=CVE-2022-50211 Référence CVE CVE-2022-50228 https://www.cve.org/CVERecord?id=CVE-2022-50228 Référence CVE CVE-2022-50229 https://www.cve.org/CVERecord?id=CVE-2022-50229 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2023-52813 https://www.cve.org/CVERecord?id=CVE-2023-52813 Référence CVE CVE-2023-53020 https://www.cve.org/CVERecord?id=CVE-2023-53020 Référence CVE CVE-2023-53117 https://www.cve.org/CVERecord?id=CVE-2023-53117 Référence CVE CVE-2024-26661 https://www.cve.org/CVERecord?id=CVE-2024-26661 Référence CVE CVE-2024-28956 https://www.cve.org/CVERecord?id=CVE-2024-28956 Référence CVE CVE-2024-46733 https://www.cve.org/CVERecord?id=CVE-2024-46733 Référence CVE CVE-2024-47674 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0787Multiples vulnérabilités dans le noyau Linux de SUSE

.com/support/update/announcement/2025/suse-su-202503184-1 Bulletin de sécurité SUSE SUSE-SU-2025:03185-1 du 12 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503185-1 Bulletin de sécurité SUSE SUSE-SU-2025:03186-1 du 12 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503186-1 Bulletin de sécurité SUSE SUSE-SU-2025:03188-1 du 12 septembre 2025 https://www.suse.com/support/update/announcement/2025/suse-su-202503188-1 Référence CVE CVE-2022-49053 https://www.cve.org/CVERecord?id=CVE-2022-49053 Référence CVE CVE-2023-3867 https://www.cve.org/CVERecord?id=CVE-2023-3867 Référence CVE CVE-2023-4130 https://www.cve.org/CVERecord?id=CVE-2023-4130 Référence CVE CVE-2023-4515 https://www.cve.org/CVERecord?id=CVE-2023-4515 Référence CVE CVE-2024-26661 https://www.cve.org/CVERecord?id=CVE-2024-26661 Référence CVE CVE-2024-46733 https://www.cve.org/CVERecord?id=CVE-2024-46733 Référence CVE CVE-2024-47674 https://www.cve.org/CVERecord?id=CVE-2024-47674 Référence CVE CVE-2024-47706 https://www.cve.org/CVERecord?id=CVE-2024-47706 Référence CVE CVE-2024-49867 https://www.cve.org/CVERecord?id=CVE-2024-49867 Référence CVE CVE-2024-58238 https://www.cve.org/CVERecord?id=CVE-2024-58238 Référence CVE CVE-2024-58239 https://www.cve.org/CVERecord?id=CVE

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
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < aeb974907642be095e38ecb1a400ca583958b2b0; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < f339d76a3a972601d0738b881b099d49ebbdc3a2; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 4bf629262f9118ee91b1c3a518ebf2b3bcb22180; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 79ed288cef201f1f212dfb934bcaac75572fb8f6; 5.15
Fixed
< 5.15; 5.15.127 ≤ 5.15.*; 6.1.46 ≤ 6.1.*; 6.4.11 ≤ 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. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 16 Aug 2025 · Last source change 15 Aug 2026, 12:23 UTC · CWE not yet assigned

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-2023-54012
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD modified after enrichment

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

Material change intelligence

What changed after publication

View recent updates →
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    0626e6641f6b467447c81dd7678a69c66f7746cf < aeb974907642be095e38ecb1a400ca583958b2b0; 0626e6641f6b467447c81dd7678a69c66f7746cf < f339d76a3a972601d0738b881b099d49ebbdc3a2; 0626e6641f6b467447c81dd7678a69c66f7746cf < 4bf629262f9118ee91b1c3a518ebf2b3bcb22180; 0626e6641f6b467447c81dd7678a69c66f7746cf < 79ed288cef201f1f212dfb934bcaac75572fb8f6; 5.15 · Fixed: < 5.15; 5.15.127 ≤ 5.15.*; 6.1.46 ≤ 6.1.*; 6.4.11 ≤ 6.4.*; 6.5 ≤ *
    After
    e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < aeb974907642be095e38ecb1a400ca583958b2b0; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < f339d76a3a972601d0738b881b099d49ebbdc3a2; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 4bf629262f9118ee91b1c3a518ebf2b3bcb22180; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 79ed288cef201f1f212dfb934bcaac75572fb8f6; 5.15 · Fixed: < 5.15; 5.15.127 ≤ 5.15.*; 6.1.46 ≤ 6.1.*; 6.4.11 ≤ 6.4.*; 6.5 ≤ *
    CNA
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-2023-4130 · cve.blacktree.nl