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Full vulnerability report · 2025
CVE-2023-53033High confidence

netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits

Linux · Linux

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

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 2 structured product or package states 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:Medium, lowered one band.downgradedsince 5 Aug 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.20% 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.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Linux Linux 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: As exposure requiresRemediation target: Within 365 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 2 structured product or package states 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.

6 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 2 affected package states 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.6.1.7-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.1.7-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.1.7-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.1.7-1Debian Security Tracker ↗Source updated 6 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 6 Oct 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 Ubuntu Security ↗Source updated 6 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-2023-53033 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits
50 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • bpftool as a component of Red Hat Enterprise Linux 7
  • kernel as a component of Red Hat Enterprise Linux 7
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7
  • kernel-bootwrapper as a component of Red Hat Enterprise Linux 7
  • kernel-debug as a component of Red Hat Enterprise Linux 7
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 7
  • kernel-devel as a component of Red Hat Enterprise Linux 7
  • kernel-doc as a component of Red Hat Enterprise Linux 7
  • kernel-headers as a component of Red Hat Enterprise Linux 7
  • kernel-kdump as a component of Red Hat Enterprise Linux 7
  • kernel-kdump-devel as a component of Red Hat Enterprise Linux 7
  • kernel-rt as a component of Red Hat Enterprise Linux 7
Summary
A flaw was found in the Linux kernel's `netfilter` subsystem, specifically within the `nft_payload` component. An incorrect arithmetic operation when processing VLAN (Virtual Local Area Network) header bits in double-tagged packets can lead to a heap-buffer-overflow. A local attacker could exploit this to cause a denial of service or potentially disclose sensitive information.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
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-2023-59687

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; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits If the offset + length goes over the ethernet + vlan header, then the length is adjusted to copy the bytes that are within the boundaries of the vlan_ethhdr scratchpad area. The remaining bytes beyond ethernet + vlan header are copied directly from the skbuff data area. Fix incorrect arithmetic operator: subtract, not add, the size of the vlan header in case of double-tagged packets to adjust the length accordingly to address CVE-2023-0179.

What

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits If the offset + length goes over the ethernet + vlan header, then the length is adjusted to copy the bytes that are within the boundaries of the vlan_ethhdr scratchpad area. The remaining bytes beyond ethernet + vlan header are copied directly from the skbuff data area. Fix incorrect arithmetic operator: subtract, not add, the size of the vlan header in case of double-tagged packets to adjust the length accordingly to address CVE-2023-0179.

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 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: netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits If the offset + length goes over the ethernet + vlan header, then the length is adjusted to copy the bytes that are within the boundaries of the vlan_ethhdr scratchpad area. The remaining bytes beyond ethernet + vlan header are copied directly from the skbuff data area. Fix incorrect arithmetic operator: subtract, not add, the size of the vlan header in case of double-tagged packets to adjust the length accordingly to address CVE-2023-0179.

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 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 → vulnerable operation → 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.
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: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.
A

Official authority intelligence

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

BSI · German · WID-SEC-2025-0649Linux Kernel: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder nicht spezifizierte Effekte zu erzielen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20250402Security Bulletin 02 Apr 2025 [1.46 MB]

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 02 Apr 2025 [1.46 MB], published on 2 April 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1057Multiples vulnérabilités dans les produits VMware

d?id=CVE-2023-53015 Référence CVE CVE-2023-53016 https://www.cve.org/CVERecord?id=CVE-2023-53016 Référence CVE CVE-2023-53017 https://www.cve.org/CVERecord?id=CVE-2023-53017 Référence CVE CVE-2023-53019 https://www.cve.org/CVERecord?id=CVE-2023-53019 Référence CVE CVE-2023-53026 https://www.cve.org/CVERecord?id=CVE-2023-53026 Référence CVE CVE-2023-53029 https://www.cve.org/CVERecord?id=CVE-2023-53029 Référence CVE CVE-2023-53030 https://www.cve.org/CVERecord?id=CVE-2023-53030 Référence CVE CVE-2023-53031 https://www.cve.org/CVERecord?id=CVE-2023-53031 Référence CVE CVE-2023-53032 https://www.cve.org/CVERecord?id=CVE-2023-53032 Référence CVE CVE-2023-53033 https://www.cve.org/CVERecord?id=CVE-2023-53033 Référence CVE CVE-2023-5363 https://www.cve.org/CVERecord?id=CVE-2023-5363 Référence CVE CVE-2023-5678 https://www.cve.org/CVERecord?id=CVE-2023-5678 Référence CVE CVE-2023-6129 https://www.cve.org/CVERecord?id=CVE-2023-6129 Référence CVE CVE-2023-6237 https://www.cve.org/CVERecord?id=CVE-2023-6237 Référence CVE CVE-2023-6597 https://www.cve.org/CVERecord?id=CVE-2023-6597 Référence CVE CVE-2023-7042 https://www.cve.org/CVERecord?id=CVE-2023-7042 Référence CVE CVE-2023-7104 https://www.cve.org/CVERecord?id=CVE-2023-7104 Référence CVE CVE-2024-0397 https://www.cve.org/CVERecord?id=CVE-2024-0397 R

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0449Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53001 Référence CVE CVE-2023-53002 https://www.cve.org/CVERecord?id=CVE-2023-53002 Référence CVE CVE-2023-53009 https://www.cve.org/CVERecord?id=CVE-2023-53009 Référence CVE CVE-2023-53014 https://www.cve.org/CVERecord?id=CVE-2023-53014 Référence CVE CVE-2023-53018 https://www.cve.org/CVERecord?id=CVE-2023-53018 Référence CVE CVE-2023-53023 https://www.cve.org/CVERecord?id=CVE-2023-53023 Référence CVE CVE-2023-53026 https://www.cve.org/CVERecord?id=CVE-2023-53026 Référence CVE CVE-2023-53031 https://www.cve.org/CVERecord?id=CVE-2023-53031 Référence CVE CVE-2023-53032 https://www.cve.org/CVERecord?id=CVE-2023-53032 Référence CVE CVE-2023-53033 https://www.cve.org/CVERecord?id=CVE-2023-53033 Référence CVE CVE-2023-53034 https://www.cve.org/CVERecord?id=CVE-2023-53034 Référence CVE CVE-2023-53051 https://www.cve.org/CVERecord?id=CVE-2023-53051 Référence CVE CVE-2024-27018 https://www.cve.org/CVERecord?id=CVE-2024-27018 Référence CVE CVE-2024-27415 https://www.cve.org/CVERecord?id=CVE-2024-27415 Référence CVE CVE-2024-28956 https://www.cve.org/CVERecord?id=CVE-2024-28956 Référence CVE CVE-2024-35840 https://www.cve.org/CVERecord?id=CVE-2024-35840 Référence CVE CVE-2024-42307 https://www.cve.org/CVERecord?id=CVE-2024-42307 Référence CVE CVE-2024-43882 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0336Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53019 Référence CVE CVE-2023-53023 https://www.cve.org/CVERecord?id=CVE-2023-53023 Référence CVE CVE-2023-53024 https://www.cve.org/CVERecord?id=CVE-2023-53024 Référence CVE CVE-2023-53025 https://www.cve.org/CVERecord?id=CVE-2023-53025 Référence CVE CVE-2023-53026 https://www.cve.org/CVERecord?id=CVE-2023-53026 Référence CVE CVE-2023-53028 https://www.cve.org/CVERecord?id=CVE-2023-53028 Référence CVE CVE-2023-53029 https://www.cve.org/CVERecord?id=CVE-2023-53029 Référence CVE CVE-2023-53030 https://www.cve.org/CVERecord?id=CVE-2023-53030 Référence CVE CVE-2023-53031 https://www.cve.org/CVERecord?id=CVE-2023-53031 Référence CVE CVE-2023-53033 https://www.cve.org/CVERecord?id=CVE-2023-53033 Référence CVE CVE-2024-26634 https://www.cve.org/CVERecord?id=CVE-2024-26634 Référence CVE CVE-2024-35910 https://www.cve.org/CVERecord?id=CVE-2024-35910 Référence CVE CVE-2024-36968 https://www.cve.org/CVERecord?id=CVE-2024-36968 Référence CVE CVE-2024-38559 https://www.cve.org/CVERecord?id=CVE-2024-38559 Référence CVE CVE-2024-41005 https://www.cve.org/CVERecord?id=CVE-2024-41005 Référence CVE CVE-2024-41090 https://www.cve.org/CVERecord?id=CVE-2024-41090 Référence CVE CVE-2024-47678 https://www.cve.org/CVERecord?id=CVE-2024-47678 Référence CVE CVE-2024-49571 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0307Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53016 Référence CVE CVE-2023-53019 https://www.cve.org/CVERecord?id=CVE-2023-53019 Référence CVE CVE-2023-53023 https://www.cve.org/CVERecord?id=CVE-2023-53023 Référence CVE CVE-2023-53024 https://www.cve.org/CVERecord?id=CVE-2023-53024 Référence CVE CVE-2023-53025 https://www.cve.org/CVERecord?id=CVE-2023-53025 Référence CVE CVE-2023-53026 https://www.cve.org/CVERecord?id=CVE-2023-53026 Référence CVE CVE-2023-53028 https://www.cve.org/CVERecord?id=CVE-2023-53028 Référence CVE CVE-2023-53029 https://www.cve.org/CVERecord?id=CVE-2023-53029 Référence CVE CVE-2023-53030 https://www.cve.org/CVERecord?id=CVE-2023-53030 Référence CVE CVE-2023-53033 https://www.cve.org/CVERecord?id=CVE-2023-53033 Référence CVE CVE-2024-2201 https://www.cve.org/CVERecord?id=CVE-2024-2201 Référence CVE CVE-2024-26634 https://www.cve.org/CVERecord?id=CVE-2024-26634 Référence CVE CVE-2024-26873 https://www.cve.org/CVERecord?id=CVE-2024-26873 Référence CVE CVE-2024-35826 https://www.cve.org/CVERecord?id=CVE-2024-35826 Référence CVE CVE-2024-35910 https://www.cve.org/CVERecord?id=CVE-2024-35910 Référence CVE CVE-2024-38606 https://www.cve.org/CVERecord?id=CVE-2024-38606 Référence CVE CVE-2024-41005 https://www.cve.org/CVERecord?id=CVE-2024-41005 Référence CVE CVE-2024-41077 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-029892Linux の Linux Kernel における脆弱性

Linux の Linux Kernel には、不特定の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
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 27 Mar 2025 · Last source change 5 Aug 2026, 09:12 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-2023-59687
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
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 ↗

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-2023-59687↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update 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-2023-53033 · cve.blacktree.nl