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Full vulnerability report · 2025
CVE-2025-21786High confidence

workqueue: Put the pwq after detaching the rescuer from the pool

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.

10 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-nvidia-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
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-2025-21786 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: workqueue: Put the pwq after detaching the rescuer from the pool
70 known affected

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

  • bpftool as a component of Red Hat Enterprise Linux 8
  • kernel as a component of Red Hat Enterprise Linux 8
  • kernel-abi-stablelists as a component of Red Hat Enterprise Linux 8
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 8
  • kernel-core as a component of Red Hat Enterprise Linux 8
  • kernel-cross-headers as a component of Red Hat Enterprise Linux 8
  • kernel-debug as a component of Red Hat Enterprise Linux 8
  • kernel-debug-core as a component of Red Hat Enterprise Linux 8
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 8
  • kernel-debug-modules as a component of Red Hat Enterprise Linux 8
  • kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 8
  • kernel-debug-modules-internal as a component of Red Hat Enterprise Linux 8
Summary
A vulnerability was found in the Linux kernel's work queue subsystem, which manages background task execution. The issue stems from improper handling of the "rescuer" thread during the cleanup of unbound work queues.
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.

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-2025-5141

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: workqueue: Put the pwq after detaching the rescuer from the pool The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), which caused a use-after-free bug reported by Cheung Wall. To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.

What

In the Linux kernel, the following vulnerability has been resolved: workqueue: Put the pwq after detaching the rescuer from the pool The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), which caused a use-after-free bug reported by Cheung Wall. To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

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: workqueue: Put the pwq after detaching the rescuer from the pool The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), which caused a use-after-free bug reported by Cheung Wall. To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

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 → Use After Free → 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-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

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.
CWE-416
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-2253IBM Security Verify Access: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um erweiterte Berechtigungen zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, sensible Informationen offenzulegen und andere, nicht näher bezeichnete Angriffe durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2025-0453Linux Kernel: Mehrere Schwachstellen

Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20250305Security Bulletin 5 March 2025

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 5 March 2025, published on 5 March 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-2025-21734 Référence CVE CVE-2025-21738 https://www.cve.org/CVERecord?id=CVE-2025-21738 Référence CVE CVE-2025-21739 https://www.cve.org/CVERecord?id=CVE-2025-21739 Référence CVE CVE-2025-21750 https://www.cve.org/CVERecord?id=CVE-2025-21750 Référence CVE CVE-2025-21751 https://www.cve.org/CVERecord?id=CVE-2025-21751 Référence CVE CVE-2025-21752 https://www.cve.org/CVERecord?id=CVE-2025-21752 Référence CVE CVE-2025-21759 https://www.cve.org/CVERecord?id=CVE-2025-21759 Référence CVE CVE-2025-21768 https://www.cve.org/CVERecord?id=CVE-2025-21768 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21801 https://www.cve.org/CVERecord?id=CVE-2025-21801 Référence CVE CVE-2025-21812 https://www.cve.org/CVERecord?id=CVE-2025-21812 Référence CVE CVE-2025-21816 https://www.cve.org/CVERecord?id=CVE-2025-21816 Référence CVE CVE-2025-21817 https://www.cve.org/CVERecord?id=CVE-2025-21817 Référence CVE CVE-2025-21819 https://www.cve.org/CVERecord?id=CVE-2025-21819 Référence CVE CVE-2025-21821 https://www.cve.org/CVERecord?id=CVE-2025-21821 Référence CVE CVE-2025-21825 https://www.cve.org/CVERecord?id=

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

d?id=CVE-2025-21734 Référence CVE CVE-2025-21738 https://www.cve.org/CVERecord?id=CVE-2025-21738 Référence CVE CVE-2025-21739 https://www.cve.org/CVERecord?id=CVE-2025-21739 Référence CVE CVE-2025-21750 https://www.cve.org/CVERecord?id=CVE-2025-21750 Référence CVE CVE-2025-21751 https://www.cve.org/CVERecord?id=CVE-2025-21751 Référence CVE CVE-2025-21752 https://www.cve.org/CVERecord?id=CVE-2025-21752 Référence CVE CVE-2025-21759 https://www.cve.org/CVERecord?id=CVE-2025-21759 Référence CVE CVE-2025-21768 https://www.cve.org/CVERecord?id=CVE-2025-21768 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21801 https://www.cve.org/CVERecord?id=CVE-2025-21801 Référence CVE CVE-2025-21812 https://www.cve.org/CVERecord?id=CVE-2025-21812 Référence CVE CVE-2025-21816 https://www.cve.org/CVERecord?id=CVE-2025-21816 Référence CVE CVE-2025-21817 https://www.cve.org/CVERecord?id=CVE-2025-21817 Référence CVE CVE-2025-21819 https://www.cve.org/CVERecord?id=CVE-2025-21819 Référence CVE CVE-2025-21821 https://www.cve.org/CVERecord?id=CVE-2025-21821 Référence CVE CVE-2025-21825 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0168Multiples vulnérabilités dans le noyau Linux de Red Hat

d?id=CVE-2022-50865 Référence CVE CVE-2023-53192 https://www.cve.org/CVERecord?id=CVE-2023-53192 Référence CVE CVE-2023-53539 https://www.cve.org/CVERecord?id=CVE-2023-53539 Référence CVE CVE-2023-53581 https://www.cve.org/CVERecord?id=CVE-2023-53581 Référence CVE CVE-2023-53673 https://www.cve.org/CVERecord?id=CVE-2023-53673 Référence CVE CVE-2023-53751 https://www.cve.org/CVERecord?id=CVE-2023-53751 Référence CVE CVE-2023-53833 https://www.cve.org/CVERecord?id=CVE-2023-53833 Référence CVE CVE-2024-54456 https://www.cve.org/CVERecord?id=CVE-2024-54456 Référence CVE CVE-2025-21647 https://www.cve.org/CVERecord?id=CVE-2025-21647 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21791 https://www.cve.org/CVERecord?id=CVE-2025-21791 Référence CVE CVE-2025-37789 https://www.cve.org/CVERecord?id=CVE-2025-37789 Référence CVE CVE-2025-37819 https://www.cve.org/CVERecord?id=CVE-2025-37819 Référence CVE CVE-2025-38022 https://www.cve.org/CVERecord?id=CVE-2025-38022 Référence CVE CVE-2025-38024 https://www.cve.org/CVERecord?id=CVE-2025-38024 Référence CVE CVE-2025-38051 https://www.cve.org/CVERecord?id=CVE-2025-38051 Référence CVE CVE-2025-38403 https://www.cve.org/CVERecord?id=CVE-2025-38403 Référence CVE CVE-2025-38415 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

d?id=CVE-2025-21775 Référence CVE CVE-2025-21776 https://www.cve.org/CVERecord?id=CVE-2025-21776 Référence CVE CVE-2025-21779 https://www.cve.org/CVERecord?id=CVE-2025-21779 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21781 https://www.cve.org/CVERecord?id=CVE-2025-21781 Référence CVE CVE-2025-21782 https://www.cve.org/CVERecord?id=CVE-2025-21782 Référence CVE CVE-2025-21783 https://www.cve.org/CVERecord?id=CVE-2025-21783 Référence CVE CVE-2025-21784 https://www.cve.org/CVERecord?id=CVE-2025-21784 Référence CVE CVE-2025-21785 https://www.cve.org/CVERecord?id=CVE-2025-21785 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21787 https://www.cve.org/CVERecord?id=CVE-2025-21787 Référence CVE CVE-2025-21790 https://www.cve.org/CVERecord?id=CVE-2025-21790 Référence CVE CVE-2025-21791 https://www.cve.org/CVERecord?id=CVE-2025-21791 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21793 https://www.cve.org/CVERecord?id=CVE-2025-21793 Référence CVE CVE-2025-21795 https://www.cve.org/CVERecord?id=CVE-2025-21795 Référence CVE CVE-2025-21796 https://www.cve.org/CVERecord?id=CVE-2025-21796 Référence CVE CVE-2025-21798 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0758Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2025-21775 Référence CVE CVE-2025-21776 https://www.cve.org/CVERecord?id=CVE-2025-21776 Référence CVE CVE-2025-21779 https://www.cve.org/CVERecord?id=CVE-2025-21779 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21781 https://www.cve.org/CVERecord?id=CVE-2025-21781 Référence CVE CVE-2025-21782 https://www.cve.org/CVERecord?id=CVE-2025-21782 Référence CVE CVE-2025-21783 https://www.cve.org/CVERecord?id=CVE-2025-21783 Référence CVE CVE-2025-21784 https://www.cve.org/CVERecord?id=CVE-2025-21784 Référence CVE CVE-2025-21785 https://www.cve.org/CVERecord?id=CVE-2025-21785 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21787 https://www.cve.org/CVERecord?id=CVE-2025-21787 Référence CVE CVE-2025-21790 https://www.cve.org/CVERecord?id=CVE-2025-21790 Référence CVE CVE-2025-21791 https://www.cve.org/CVERecord?id=CVE-2025-21791 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21793 https://www.cve.org/CVERecord?id=CVE-2025-21793 Référence CVE CVE-2025-21795 https://www.cve.org/CVERecord?id=CVE-2025-21795 Référence CVE CVE-2025-21796 https://www.cve.org/CVERecord?id=CVE-2025-21796 Référence CVE CVE-2025-21798 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0743Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2025-21775 Référence CVE CVE-2025-21776 https://www.cve.org/CVERecord?id=CVE-2025-21776 Référence CVE CVE-2025-21779 https://www.cve.org/CVERecord?id=CVE-2025-21779 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21781 https://www.cve.org/CVERecord?id=CVE-2025-21781 Référence CVE CVE-2025-21782 https://www.cve.org/CVERecord?id=CVE-2025-21782 Référence CVE CVE-2025-21783 https://www.cve.org/CVERecord?id=CVE-2025-21783 Référence CVE CVE-2025-21784 https://www.cve.org/CVERecord?id=CVE-2025-21784 Référence CVE CVE-2025-21785 https://www.cve.org/CVERecord?id=CVE-2025-21785 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21787 https://www.cve.org/CVERecord?id=CVE-2025-21787 Référence CVE CVE-2025-21790 https://www.cve.org/CVERecord?id=CVE-2025-21790 Référence CVE CVE-2025-21791 https://www.cve.org/CVERecord?id=CVE-2025-21791 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21793 https://www.cve.org/CVERecord?id=CVE-2025-21793 Référence CVE CVE-2025-21795 https://www.cve.org/CVERecord?id=CVE-2025-21795 Référence CVE CVE-2025-21796 https://www.cve.org/CVERecord?id=CVE-2025-21796 Référence CVE CVE-2025-21821 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0721Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2025-21775 Référence CVE CVE-2025-21776 https://www.cve.org/CVERecord?id=CVE-2025-21776 Référence CVE CVE-2025-21779 https://www.cve.org/CVERecord?id=CVE-2025-21779 Référence CVE CVE-2025-21780 https://www.cve.org/CVERecord?id=CVE-2025-21780 Référence CVE CVE-2025-21781 https://www.cve.org/CVERecord?id=CVE-2025-21781 Référence CVE CVE-2025-21782 https://www.cve.org/CVERecord?id=CVE-2025-21782 Référence CVE CVE-2025-21783 https://www.cve.org/CVERecord?id=CVE-2025-21783 Référence CVE CVE-2025-21784 https://www.cve.org/CVERecord?id=CVE-2025-21784 Référence CVE CVE-2025-21785 https://www.cve.org/CVERecord?id=CVE-2025-21785 Référence CVE CVE-2025-21786 https://www.cve.org/CVERecord?id=CVE-2025-21786 Référence CVE CVE-2025-21787 https://www.cve.org/CVERecord?id=CVE-2025-21787 Référence CVE CVE-2025-21790 https://www.cve.org/CVERecord?id=CVE-2025-21790 Référence CVE CVE-2025-21791 https://www.cve.org/CVERecord?id=CVE-2025-21791 Référence CVE CVE-2025-21792 https://www.cve.org/CVERecord?id=CVE-2025-21792 Référence CVE CVE-2025-21793 https://www.cve.org/CVERecord?id=CVE-2025-21793 Référence CVE CVE-2025-21795 https://www.cve.org/CVERecord?id=CVE-2025-21795 Référence CVE CVE-2025-21796 https://www.cve.org/CVERecord?id=CVE-2025-21796 Référence CVE CVE-2025-21821 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-002502Linux の Linux Kernel における解放済みメモリの使用に関する脆弱性

Linux の Linux Kernel には、解放済みメモリの使用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
Fixed
Action
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.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 27 Feb 2025 · Last source change 5 Aug 2026, 11:54 UTC · CWE-416 · Use After Free

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-2025-5141
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCISA ADP
NVD statusNVD enriched

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-2025-5141↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor 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-2025-21786 · cve.blacktree.nl