VDB-324369 · CVE-2023-53266 · Nessus 265261

Linux Kernel up to 6.2.2 arm64 ffh_ctxt memory leak

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.2.2 and classified as critical. Affected by this issue is the function ffh_ctxt of the component arm64. Performing a manipulation results in memory leak. This vulnerability is cataloged as CVE-2023-53266. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.2.2. This affects the function ffh_ctxt of the component arm64. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix the same by moving the allocation after the SMCCC version and conduit checks.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53266 since 09/16/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 265261 (Linux Distros Unpatched Vulnerability : CVE-2023-53266), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.2.3 eliminates this vulnerability. Applying the patch 7521da2eb42d65f89f511b7912d3757cf3d9168a/1b561d3949f8478c5403c9752b5533211a757226 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 CNNVD (CNNVD-202509-2616), Tenable (265261) and CERT Bund (WID-SEC-2025-2053). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
IBM QRadar SIEM
SUSE openSUSE
Open Source Linux Kernel
RESF Rocky Linux
Dell Secure Connect Gateway
F5 F5OS

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

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 265261
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53266

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.2.3
Patch: 7521da2eb42d65f89f511b7912d3757cf3d9168a/1b561d3949f8478c5403c9752b5533211a757226

Timelineinfo

09/16/2025 Advisory disclosed
09/16/2025 +0 days CVE reserved
09/16/2025 +0 days VulDB entry created
01/11/2026 +117 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53266 (🔒)
GCVE (CVE): GCVE-0-2023-53266
GCVE (VulDB): GCVE-100-324369
CERT Bund: WID-SEC-2025-2053 - Linux Kernel: Mehrere Schwachstellen
CNNVD: CNNVD-202509-2616 - Linux kernel 安全漏洞

Entryinfo

Created: 09/16/2025 14:04
Updated: 01/11/2026 09:08
Changes: 09/16/2025 14:04 (59), 09/18/2025 03:46 (6), 09/18/2025 17:28 (2), 12/03/2025 03:21 (10), 12/29/2025 06:58 (7), 01/11/2026 09:08 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.