VDB-343626 · CVE-2026-23024 · EUVD-2026-5070

Linux Kernel up to 6.18.5/6.19-rc4 flow_steer_list_lock memory leak

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.18.5/6.19-rc4. This affects the function flow_steer_list_lock. The manipulation results in memory leak. This vulnerability is identified as CVE-2026-23024. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.5/6.19-rc4. It has been classified as critical. Affected is the function flow_steer_list_lock. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: idpf: fix memory leak of flow steer list on rmmod The flow steering list maintains entries that are added and removed as ethtool creates and deletes flow steering rules. Module removal with active entries causes memory leak as the list is not properly cleaned up. Prevent this by iterating through the remaining entries in the list and freeing the associated memory during module removal. Add a spinlock (flow_steer_list_lock) to protect the list access from multiple threads.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-23024 since 01/13/2026. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 297456 (Linux Distros Unpatched Vulnerability : CVE-2026-23024), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.6 or 6.19-rc5 eliminates this vulnerability. Applying the patch 1aedff70a5e97628eaaf17b169774cb6a45a1dc5/f9841bd28b600526ca4f6713b0ca49bf7bb98452 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (297456), EUVD (EUVD-2026-5070) and CERT Bund (WID-SEC-2026-0280). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

Open Source Linux Kernel

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 297456
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23024

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.6/6.19-rc5
Patch: 1aedff70a5e97628eaaf17b169774cb6a45a1dc5/f9841bd28b600526ca4f6713b0ca49bf7bb98452

Timelineinfo

01/13/2026 CVE reserved
01/31/2026 +18 days Advisory disclosed
01/31/2026 +0 days VulDB entry created
03/25/2026 +53 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23024 (🔒)
GCVE (CVE): GCVE-0-2026-23024
GCVE (VulDB): GCVE-100-343626
EUVD: 🔒
CERT Bund: WID-SEC-2026-0280 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/31/2026 15:28
Updated: 03/25/2026 18:03
Changes: 01/31/2026 15:28 (58), 02/01/2026 01:18 (1), 02/01/2026 08:02 (2), 02/02/2026 20:51 (7), 03/25/2026 18:03 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.