BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2025
CVE-2023-53733High confidence

net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode

Linux · Linux

7.8HighCVSS 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.

8 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-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-2023-60037

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: net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode When u32_replace_hw_knode fails, we need to undo the tcf_bind_filter operation done at u32_set_parms.

What

In the Linux kernel, the following vulnerability has been resolved: net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode When u32_replace_hw_knode fails, we need to undo the tcf_bind_filter operation done at u32_set_parms.

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: net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode When u32_replace_hw_knode fails, we need to undo the tcf_bind_filter operation done at u32_set_parms.

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-2026-0349Dell Avamar und NetWorker: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell Avamar und Dell NetWorker ausnutzen, um Angriffe zu starten, die die Integrität, Vertraulichkeit und Verfügbarkeit von Systemen beeinträchtigen.

Official advisory ↗
BSI · German · WID-SEC-2025-2407Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen.

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

d?id=CVE-2023-53671 Référence CVE CVE-2023-53673 https://www.cve.org/CVERecord?id=CVE-2023-53673 Référence CVE CVE-2023-53682 https://www.cve.org/CVERecord?id=CVE-2023-53682 Référence CVE CVE-2023-53685 https://www.cve.org/CVERecord?id=CVE-2023-53685 Référence CVE CVE-2023-53694 https://www.cve.org/CVERecord?id=CVE-2023-53694 Référence CVE CVE-2023-53702 https://www.cve.org/CVERecord?id=CVE-2023-53702 Référence CVE CVE-2023-53707 https://www.cve.org/CVERecord?id=CVE-2023-53707 Référence CVE CVE-2023-53714 https://www.cve.org/CVERecord?id=CVE-2023-53714 Référence CVE CVE-2023-53721 https://www.cve.org/CVERecord?id=CVE-2023-53721 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2023-53742 https://www.cve.org/CVERecord?id=CVE-2023-53742 Référence CVE CVE-2023-53743 https://www.cve.org/CVERecord?id=CVE-2023-53743 Référence CVE CVE-2023-53748 https://www.cve.org/CVERecord?id=CVE-2023-53748 Référence CVE CVE-2023-53751 https://www.cve.org/CVERecord?id=CVE-2023-53751 Référence CVE CVE-2023-53753 https://www.cve.org/CVERecord?id=CVE-2023-53753 Référence CVE CVE-2023-53764 https://www.cve.org/CVERecord?id=CVE-2023-53764 Référence CVE CVE-2023-53765 https://www.cve.org/CVERecord?id=CVE-2023-53765 Référence CVE CVE-2023-53767 https://www.cve.org/CVERecord?id=

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

d?id=CVE-2023-53671 Référence CVE CVE-2023-53673 https://www.cve.org/CVERecord?id=CVE-2023-53673 Référence CVE CVE-2023-53682 https://www.cve.org/CVERecord?id=CVE-2023-53682 Référence CVE CVE-2023-53685 https://www.cve.org/CVERecord?id=CVE-2023-53685 Référence CVE CVE-2023-53694 https://www.cve.org/CVERecord?id=CVE-2023-53694 Référence CVE CVE-2023-53702 https://www.cve.org/CVERecord?id=CVE-2023-53702 Référence CVE CVE-2023-53707 https://www.cve.org/CVERecord?id=CVE-2023-53707 Référence CVE CVE-2023-53714 https://www.cve.org/CVERecord?id=CVE-2023-53714 Référence CVE CVE-2023-53721 https://www.cve.org/CVERecord?id=CVE-2023-53721 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2023-53742 https://www.cve.org/CVERecord?id=CVE-2023-53742 Référence CVE CVE-2023-53743 https://www.cve.org/CVERecord?id=CVE-2023-53743 Référence CVE CVE-2023-53748 https://www.cve.org/CVERecord?id=CVE-2023-53748 Référence CVE CVE-2023-53751 https://www.cve.org/CVERecord?id=CVE-2023-53751 Référence CVE CVE-2023-53753 https://www.cve.org/CVERecord?id=CVE-2023-53753 Référence CVE CVE-2023-53764 https://www.cve.org/CVERecord?id=CVE-2023-53764 Référence CVE CVE-2023-53765 https://www.cve.org/CVERecord?id=CVE-2023-53765 Référence CVE CVE-2023-53767 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1073Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53723 Référence CVE CVE-2023-53724 https://www.cve.org/CVERecord?id=CVE-2023-53724 Référence CVE CVE-2023-53725 https://www.cve.org/CVERecord?id=CVE-2023-53725 Référence CVE CVE-2023-53726 https://www.cve.org/CVERecord?id=CVE-2023-53726 Référence CVE CVE-2023-53727 https://www.cve.org/CVERecord?id=CVE-2023-53727 Référence CVE CVE-2023-53728 https://www.cve.org/CVERecord?id=CVE-2023-53728 Référence CVE CVE-2023-53729 https://www.cve.org/CVERecord?id=CVE-2023-53729 Référence CVE CVE-2023-53730 https://www.cve.org/CVERecord?id=CVE-2023-53730 Référence CVE CVE-2023-53731 https://www.cve.org/CVERecord?id=CVE-2023-53731 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2023-7324 https://www.cve.org/CVERecord?id=CVE-2023-7324 Référence CVE CVE-2024-53164 https://www.cve.org/CVERecord?id=CVE-2024-53164 Référence CVE CVE-2024-57891 https://www.cve.org/CVERecord?id=CVE-2024-57891 Référence CVE CVE-2024-57951 https://www.cve.org/CVERecord?id=CVE-2024-57951 Référence CVE CVE-2024-57952 https://www.cve.org/CVERecord?id=CVE-2024-57952 Référence CVE CVE-2024-58090 https://www.cve.org/CVERecord?id=CVE-2024-58090 Référence CVE CVE-2025-21816 https://www.cve.org/CVERecord?id=CVE-2025-21816 Référence CVE CVE-2025-22034 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1047Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53721 Référence CVE CVE-2023-53722 https://www.cve.org/CVERecord?id=CVE-2023-53722 Référence CVE CVE-2023-53725 https://www.cve.org/CVERecord?id=CVE-2023-53725 Référence CVE CVE-2023-53726 https://www.cve.org/CVERecord?id=CVE-2023-53726 Référence CVE CVE-2023-53727 https://www.cve.org/CVERecord?id=CVE-2023-53727 Référence CVE CVE-2023-53728 https://www.cve.org/CVERecord?id=CVE-2023-53728 Référence CVE CVE-2023-53729 https://www.cve.org/CVERecord?id=CVE-2023-53729 Référence CVE CVE-2023-53730 https://www.cve.org/CVERecord?id=CVE-2023-53730 Référence CVE CVE-2023-53731 https://www.cve.org/CVERecord?id=CVE-2023-53731 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2023-7324 https://www.cve.org/CVERecord?id=CVE-2023-7324 Référence CVE CVE-2024-53141 https://www.cve.org/CVERecord?id=CVE-2024-53141 Référence CVE CVE-2024-56633 https://www.cve.org/CVERecord?id=CVE-2024-56633 Référence CVE CVE-2025-23145 https://www.cve.org/CVERecord?id=CVE-2025-23145 Référence CVE CVE-2025-38008 https://www.cve.org/CVERecord?id=CVE-2025-38008 Référence CVE CVE-2025-38476 https://www.cve.org/CVERecord?id=CVE-2025-38476 Référence CVE CVE-2025-38500 https://www.cve.org/CVERecord?id=CVE-2025-38500 Référence CVE CVE-2025-38539 https://www.cve.org/CVERecord?id=CV

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

d?id=CVE-2023-53723 Référence CVE CVE-2023-53724 https://www.cve.org/CVERecord?id=CVE-2023-53724 Référence CVE CVE-2023-53725 https://www.cve.org/CVERecord?id=CVE-2023-53725 Référence CVE CVE-2023-53726 https://www.cve.org/CVERecord?id=CVE-2023-53726 Référence CVE CVE-2023-53727 https://www.cve.org/CVERecord?id=CVE-2023-53727 Référence CVE CVE-2023-53728 https://www.cve.org/CVERecord?id=CVE-2023-53728 Référence CVE CVE-2023-53729 https://www.cve.org/CVERecord?id=CVE-2023-53729 Référence CVE CVE-2023-53730 https://www.cve.org/CVERecord?id=CVE-2023-53730 Référence CVE CVE-2023-53731 https://www.cve.org/CVERecord?id=CVE-2023-53731 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2023-7324 https://www.cve.org/CVERecord?id=CVE-2023-7324 Référence CVE CVE-2024-26584 https://www.cve.org/CVERecord?id=CVE-2024-26584 Référence CVE CVE-2024-45016 https://www.cve.org/CVERecord?id=CVE-2024-45016 Référence CVE CVE-2024-46818 https://www.cve.org/CVERecord?id=CVE-2024-46818 Référence CVE CVE-2024-47674 https://www.cve.org/CVERecord?id=CVE-2024-47674 Référence CVE CVE-2024-47684 https://www.cve.org/CVERecord?id=CVE-2024-47684 Référence CVE CVE-2024-47706 https://www.cve.org/CVERecord?id=CVE-2024-47706 Référence CVE CVE-2024-49860 https://www.cve.org/CVERecord?id=CV

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

d?id=CVE-2023-53721 Référence CVE CVE-2023-53722 https://www.cve.org/CVERecord?id=CVE-2023-53722 Référence CVE CVE-2023-53725 https://www.cve.org/CVERecord?id=CVE-2023-53725 Référence CVE CVE-2023-53726 https://www.cve.org/CVERecord?id=CVE-2023-53726 Référence CVE CVE-2023-53727 https://www.cve.org/CVERecord?id=CVE-2023-53727 Référence CVE CVE-2023-53728 https://www.cve.org/CVERecord?id=CVE-2023-53728 Référence CVE CVE-2023-53729 https://www.cve.org/CVERecord?id=CVE-2023-53729 Référence CVE CVE-2023-53730 https://www.cve.org/CVERecord?id=CVE-2023-53730 Référence CVE CVE-2023-53731 https://www.cve.org/CVERecord?id=CVE-2023-53731 Référence CVE CVE-2023-53733 https://www.cve.org/CVERecord?id=CVE-2023-53733 Référence CVE CVE-2024-26584 https://www.cve.org/CVERecord?id=CVE-2024-26584 Référence CVE CVE-2024-26804 https://www.cve.org/CVERecord?id=CVE-2024-26804 Référence CVE CVE-2024-26808 https://www.cve.org/CVERecord?id=CVE-2024-26808 Référence CVE CVE-2024-26924 https://www.cve.org/CVERecord?id=CVE-2024-26924 Référence CVE CVE-2024-26935 https://www.cve.org/CVERecord?id=CVE-2024-26935 Référence CVE CVE-2024-27397 https://www.cve.org/CVERecord?id=CVE-2024-27397 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=

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: d34e3e181395192d6d1f50dd97bd7854e04e33a4 < a9345793469b65ee5ba7b033239916c2a67d3dd4, d34e3e181395192d6d1f50dd97bd7854e04e33a4 < 025159ed118ba5145b241d574edadb0e00d3c20f, d34e3e181395192d6d1f50dd97bd7854e04e33a4 < 9cb36faedeafb9720ac236aeae2ea57091d90a09, 4.7
Fixed
Linux: < 4.7, 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 24 Oct 2025 · Last source change 5 Aug 2026, 09:15 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-2023-60037
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD not scheduled

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
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-2023-53733 · cve.blacktree.nl